diff --git a/ModernWpf.Controls/CommandBarFlyout/CommandBarFlyout.xaml b/ModernWpf.Controls/CommandBarFlyout/CommandBarFlyout.xaml
index 38bba56c..c9a11f65 100644
--- a/ModernWpf.Controls/CommandBarFlyout/CommandBarFlyout.xaml
+++ b/ModernWpf.Controls/CommandBarFlyout/CommandBarFlyout.xaml
@@ -542,138 +542,147 @@
                                 </DoubleAnimationUsingKeyFrames>
                             </Storyboard>
                             <Storyboard x:Key="CollapsedToExpandedUpStoryboard">
-                                <DoubleAnimation
-                                    Storyboard.TargetName="OuterOverflowContentRoot"
-                                    Storyboard.TargetProperty="Opacity"
-                                    To="1"
-                                    Duration="0" />
-                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentRoot" Storyboard.TargetProperty="Width">
-                                    <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandedWidth}" />
-                                </ObjectAnimationUsingKeyFrames>
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="MoreButtonTransform" Storyboard.TargetProperty="X">
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionMoreButtonAnimationStartPosition}" />
-                                    <SplineDoubleKeyFrame KeyTime="0:0:0.300" KeySpline="0.1,0.9 0.2,1" Value="0" />
-                                </DoubleAnimationUsingKeyFrames>
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="ContentRootClipTransform" Storyboard.TargetProperty="X">
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationStartPosition}" />
-                                    <SplineDoubleKeyFrame KeyTime="0:0:0.300" KeySpline="0.1,0.9 0.2,1" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationEndPosition}" />
-                                </DoubleAnimationUsingKeyFrames>
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OverflowContentRootClipTransform" Storyboard.TargetProperty="X">
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationStartPosition}" />
-                                    <SplineDoubleKeyFrame KeyTime="0:0:0.300" KeySpline="0.1,0.9 0.2,1" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationEndPosition}" />
-                                </DoubleAnimationUsingKeyFrames>
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OverflowContentRootClipTransform" Storyboard.TargetProperty="Y">
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandUpAnimationStartPosition}" />
-                                    <SplineDoubleKeyFrame KeyTime="0:0:0.300" KeySpline="0.1,0.9 0.2,1" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandUpAnimationEndPosition}" />
-                                </DoubleAnimationUsingKeyFrames>
-                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="CornerRadius">
-                                    <DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CornerRadius, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource BottomCornerRadiusFilterConverter}}" />
-                                </ObjectAnimationUsingKeyFrames>
-                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="PrimaryItemsRoot" Storyboard.TargetProperty="CornerRadius">
-                                    <DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CornerRadius, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource BottomCornerRadiusFilterConverter}}" />
-                                </ObjectAnimationUsingKeyFrames>
-                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="OuterOverflowContentRoot" Storyboard.TargetProperty="CornerRadius">
-                                    <DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CornerRadius, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource TopCornerRadiusFilterConverter}}" />
-                                </ObjectAnimationUsingKeyFrames>
-                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="SecondaryItemsControl" Storyboard.TargetProperty="CornerRadius">
-                                    <DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CornerRadius, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource TopCornerRadiusFilterConverter}}" />
-                                </ObjectAnimationUsingKeyFrames>
+                                <!-- Using a nested Storyboard to work around https://stackoverflow.com/questions/5002501 -->
+                                <Storyboard>
+                                    <DoubleAnimation
+                                        Storyboard.TargetName="OuterOverflowContentRoot"
+                                        Storyboard.TargetProperty="Opacity"
+                                        To="1"
+                                        Duration="0" />
+                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentRoot" Storyboard.TargetProperty="Width">
+                                        <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandedWidth}" />
+                                    </ObjectAnimationUsingKeyFrames>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="MoreButtonTransform" Storyboard.TargetProperty="X">
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionMoreButtonAnimationStartPosition}" />
+                                        <SplineDoubleKeyFrame KeyTime="0:0:0.300" KeySpline="0.1,0.9 0.2,1" Value="0" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="ContentRootClipTransform" Storyboard.TargetProperty="X">
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationStartPosition}" />
+                                        <SplineDoubleKeyFrame KeyTime="0:0:0.300" KeySpline="0.1,0.9 0.2,1" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationEndPosition}" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OverflowContentRootClipTransform" Storyboard.TargetProperty="X">
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationStartPosition}" />
+                                        <SplineDoubleKeyFrame KeyTime="0:0:0.300" KeySpline="0.1,0.9 0.2,1" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationEndPosition}" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OverflowContentRootClipTransform" Storyboard.TargetProperty="Y">
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandUpAnimationStartPosition}" />
+                                        <SplineDoubleKeyFrame KeyTime="0:0:0.300" KeySpline="0.1,0.9 0.2,1" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandUpAnimationEndPosition}" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="CornerRadius">
+                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CornerRadius, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource BottomCornerRadiusFilterConverter}}" />
+                                    </ObjectAnimationUsingKeyFrames>
+                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="PrimaryItemsRoot" Storyboard.TargetProperty="CornerRadius">
+                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CornerRadius, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource BottomCornerRadiusFilterConverter}}" />
+                                    </ObjectAnimationUsingKeyFrames>
+                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="OuterOverflowContentRoot" Storyboard.TargetProperty="CornerRadius">
+                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CornerRadius, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource TopCornerRadiusFilterConverter}}" />
+                                    </ObjectAnimationUsingKeyFrames>
+                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="SecondaryItemsControl" Storyboard.TargetProperty="CornerRadius">
+                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CornerRadius, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource TopCornerRadiusFilterConverter}}" />
+                                    </ObjectAnimationUsingKeyFrames>
+                                </Storyboard>
                             </Storyboard>
                             <Storyboard x:Key="ExpandedUpToCollapsedStoryboard" FillBehavior="Stop">
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OuterOverflowContentRoot" Storyboard.TargetProperty="Opacity">
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="1" />
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="0" />
-                                </DoubleAnimationUsingKeyFrames>
-                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentRoot" Storyboard.TargetProperty="Width">
-                                    <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandedWidth}" />
-                                </ObjectAnimationUsingKeyFrames>
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="MoreButtonTransform" Storyboard.TargetProperty="X">
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="0" />
-                                    <SplineDoubleKeyFrame KeyTime="0:0:0.150" KeySpline="0.7,0 1,0.5" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionMoreButtonAnimationStartPosition}" />
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionMoreButtonAnimationEndPosition}" />
-                                </DoubleAnimationUsingKeyFrames>
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="ContentRootClipTransform" Storyboard.TargetProperty="X">
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationEndPosition}" />
-                                    <SplineDoubleKeyFrame KeyTime="0:0:0.150" KeySpline="0.7,0 1,0.5" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationStartPosition}" />
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="0" />
-                                </DoubleAnimationUsingKeyFrames>
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OverflowContentRootClipTransform" Storyboard.TargetProperty="X">
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationEndPosition}" />
-                                    <SplineDoubleKeyFrame KeyTime="0:0:0.150" KeySpline="0.7,0 1,0.5" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationStartPosition}" />
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="0" />
-                                </DoubleAnimationUsingKeyFrames>
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OverflowContentRootClipTransform" Storyboard.TargetProperty="Y">
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandUpAnimationEndPosition}" />
-                                    <SplineDoubleKeyFrame KeyTime="0:0:0.150" KeySpline="0.7,0 1,0.5" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandUpAnimationStartPosition}" />
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandUpAnimationHoldPosition}" />
-                                </DoubleAnimationUsingKeyFrames>
+                                <Storyboard>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OuterOverflowContentRoot" Storyboard.TargetProperty="Opacity">
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="1" />
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="0" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentRoot" Storyboard.TargetProperty="Width">
+                                        <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandedWidth}" />
+                                    </ObjectAnimationUsingKeyFrames>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="MoreButtonTransform" Storyboard.TargetProperty="X">
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="0" />
+                                        <SplineDoubleKeyFrame KeyTime="0:0:0.150" KeySpline="0.7,0 1,0.5" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionMoreButtonAnimationStartPosition}" />
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionMoreButtonAnimationEndPosition}" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="ContentRootClipTransform" Storyboard.TargetProperty="X">
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationEndPosition}" />
+                                        <SplineDoubleKeyFrame KeyTime="0:0:0.150" KeySpline="0.7,0 1,0.5" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationStartPosition}" />
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="0" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OverflowContentRootClipTransform" Storyboard.TargetProperty="X">
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationEndPosition}" />
+                                        <SplineDoubleKeyFrame KeyTime="0:0:0.150" KeySpline="0.7,0 1,0.5" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationStartPosition}" />
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="0" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OverflowContentRootClipTransform" Storyboard.TargetProperty="Y">
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandUpAnimationEndPosition}" />
+                                        <SplineDoubleKeyFrame KeyTime="0:0:0.150" KeySpline="0.7,0 1,0.5" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandUpAnimationStartPosition}" />
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandUpAnimationHoldPosition}" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                </Storyboard>
                             </Storyboard>
                             <Storyboard x:Key="CollapsedToExpandedDownStoryboard">
-                                <DoubleAnimation
-                                    Storyboard.TargetName="OuterOverflowContentRoot"
-                                    Storyboard.TargetProperty="Opacity"
-                                    To="1"
-                                    Duration="0" />
-                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentRoot" Storyboard.TargetProperty="Width">
-                                    <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandedWidth}" />
-                                </ObjectAnimationUsingKeyFrames>
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="MoreButtonTransform" Storyboard.TargetProperty="X">
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionMoreButtonAnimationStartPosition}" />
-                                    <SplineDoubleKeyFrame KeyTime="0:0:0.300" KeySpline="0.1,0.9 0.2,1" Value="0" />
-                                </DoubleAnimationUsingKeyFrames>
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="ContentRootClipTransform" Storyboard.TargetProperty="X">
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationStartPosition}" />
-                                    <SplineDoubleKeyFrame KeyTime="0:0:0.300" KeySpline="0.1,0.9 0.2,1" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationEndPosition}" />
-                                </DoubleAnimationUsingKeyFrames>
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OverflowContentRootClipTransform" Storyboard.TargetProperty="X">
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationStartPosition}" />
-                                    <SplineDoubleKeyFrame KeyTime="0:0:0.300" KeySpline="0.1,0.9 0.2,1" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationEndPosition}" />
-                                </DoubleAnimationUsingKeyFrames>
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OverflowContentRootClipTransform" Storyboard.TargetProperty="Y">
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandDownAnimationStartPosition}" />
-                                    <SplineDoubleKeyFrame KeyTime="0:0:0.300" KeySpline="0.1,0.9 0.2,1" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandDownAnimationEndPosition}" />
-                                </DoubleAnimationUsingKeyFrames>
-                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="CornerRadius">
-                                    <DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CornerRadius, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource TopCornerRadiusFilterConverter}}" />
-                                </ObjectAnimationUsingKeyFrames>
-                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="PrimaryItemsRoot" Storyboard.TargetProperty="CornerRadius">
-                                    <DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CornerRadius, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource TopCornerRadiusFilterConverter}}" />
-                                </ObjectAnimationUsingKeyFrames>
-                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="OuterOverflowContentRoot" Storyboard.TargetProperty="CornerRadius">
-                                    <DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CornerRadius, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource BottomCornerRadiusFilterConverter}}" />
-                                </ObjectAnimationUsingKeyFrames>
-                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="SecondaryItemsControl" Storyboard.TargetProperty="CornerRadius">
-                                    <DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CornerRadius, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource BottomCornerRadiusFilterConverter}}" />
-                                </ObjectAnimationUsingKeyFrames>
+                                <Storyboard>
+                                    <DoubleAnimation
+                                        Storyboard.TargetName="OuterOverflowContentRoot"
+                                        Storyboard.TargetProperty="Opacity"
+                                        To="1"
+                                        Duration="0" />
+                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentRoot" Storyboard.TargetProperty="Width">
+                                        <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandedWidth}" />
+                                    </ObjectAnimationUsingKeyFrames>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="MoreButtonTransform" Storyboard.TargetProperty="X">
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionMoreButtonAnimationStartPosition}" />
+                                        <SplineDoubleKeyFrame KeyTime="0:0:0.300" KeySpline="0.1,0.9 0.2,1" Value="0" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="ContentRootClipTransform" Storyboard.TargetProperty="X">
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationStartPosition}" />
+                                        <SplineDoubleKeyFrame KeyTime="0:0:0.300" KeySpline="0.1,0.9 0.2,1" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationEndPosition}" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OverflowContentRootClipTransform" Storyboard.TargetProperty="X">
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationStartPosition}" />
+                                        <SplineDoubleKeyFrame KeyTime="0:0:0.300" KeySpline="0.1,0.9 0.2,1" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationEndPosition}" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OverflowContentRootClipTransform" Storyboard.TargetProperty="Y">
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandDownAnimationStartPosition}" />
+                                        <SplineDoubleKeyFrame KeyTime="0:0:0.300" KeySpline="0.1,0.9 0.2,1" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandDownAnimationEndPosition}" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="CornerRadius">
+                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CornerRadius, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource TopCornerRadiusFilterConverter}}" />
+                                    </ObjectAnimationUsingKeyFrames>
+                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="PrimaryItemsRoot" Storyboard.TargetProperty="CornerRadius">
+                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CornerRadius, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource TopCornerRadiusFilterConverter}}" />
+                                    </ObjectAnimationUsingKeyFrames>
+                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="OuterOverflowContentRoot" Storyboard.TargetProperty="CornerRadius">
+                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CornerRadius, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource BottomCornerRadiusFilterConverter}}" />
+                                    </ObjectAnimationUsingKeyFrames>
+                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="SecondaryItemsControl" Storyboard.TargetProperty="CornerRadius">
+                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CornerRadius, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource BottomCornerRadiusFilterConverter}}" />
+                                    </ObjectAnimationUsingKeyFrames>
+                                </Storyboard>
                             </Storyboard>
                             <Storyboard x:Key="ExpandedDownToCollapsedStoryboard" FillBehavior="Stop">
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OuterOverflowContentRoot" Storyboard.TargetProperty="Opacity">
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="1" />
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="0" />
-                                </DoubleAnimationUsingKeyFrames>
-                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentRoot" Storyboard.TargetProperty="Width">
-                                    <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandedWidth}" />
-                                </ObjectAnimationUsingKeyFrames>
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="MoreButtonTransform" Storyboard.TargetProperty="X">
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="0" />
-                                    <SplineDoubleKeyFrame KeyTime="0:0:0.150" KeySpline="0.7,0 1,0.5" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionMoreButtonAnimationStartPosition}" />
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionMoreButtonAnimationEndPosition}" />
-                                </DoubleAnimationUsingKeyFrames>
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="ContentRootClipTransform" Storyboard.TargetProperty="X">
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationEndPosition}" />
-                                    <SplineDoubleKeyFrame KeyTime="0:0:0.150" KeySpline="0.7,0 1,0.5" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationStartPosition}" />
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="0" />
-                                </DoubleAnimationUsingKeyFrames>
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OverflowContentRootClipTransform" Storyboard.TargetProperty="X">
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationEndPosition}" />
-                                    <SplineDoubleKeyFrame KeyTime="0:0:0.150" KeySpline="0.7,0 1,0.5" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationStartPosition}" />
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="0" />
-                                </DoubleAnimationUsingKeyFrames>
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OverflowContentRootClipTransform" Storyboard.TargetProperty="Y">
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandDownAnimationEndPosition}" />
-                                    <SplineDoubleKeyFrame KeyTime="0:0:0.150" KeySpline="0.7,0 1,0.5" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandDownAnimationStartPosition}" />
-                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandDownAnimationHoldPosition}" />
-                                </DoubleAnimationUsingKeyFrames>
+                                <Storyboard>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OuterOverflowContentRoot" Storyboard.TargetProperty="Opacity">
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="1" />
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="0" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentRoot" Storyboard.TargetProperty="Width">
+                                        <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandedWidth}" />
+                                    </ObjectAnimationUsingKeyFrames>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="MoreButtonTransform" Storyboard.TargetProperty="X">
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="0" />
+                                        <SplineDoubleKeyFrame KeyTime="0:0:0.150" KeySpline="0.7,0 1,0.5" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionMoreButtonAnimationStartPosition}" />
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionMoreButtonAnimationEndPosition}" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="ContentRootClipTransform" Storyboard.TargetProperty="X">
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationEndPosition}" />
+                                        <SplineDoubleKeyFrame KeyTime="0:0:0.150" KeySpline="0.7,0 1,0.5" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationStartPosition}" />
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="0" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OverflowContentRootClipTransform" Storyboard.TargetProperty="X">
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationEndPosition}" />
+                                        <SplineDoubleKeyFrame KeyTime="0:0:0.150" KeySpline="0.7,0 1,0.5" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.WidthExpansionAnimationStartPosition}" />
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="0" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="OverflowContentRootClipTransform" Storyboard.TargetProperty="Y">
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandDownAnimationEndPosition}" />
+                                        <SplineDoubleKeyFrame KeyTime="0:0:0.150" KeySpline="0.7,0 1,0.5" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandDownAnimationStartPosition}" />
+                                        <DiscreteDoubleKeyFrame KeyTime="0:0:0.151" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=FlyoutTemplateSettings.ExpandDownAnimationHoldPosition}" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                </Storyboard>
                             </Storyboard>
                             <Storyboard x:Key="ExpandedUpStoryboard">
                                 <DoubleAnimation
@@ -711,10 +720,10 @@
                         <VisualStateManager.VisualStateGroups>
                             <VisualStateGroup x:Name="ExpansionStates">
                                 <VisualStateGroup.Transitions>
-                                    <VisualTransition From="Collapsed" To="ExpandedUp" GeneratedDuration="0:0:0.300" Storyboard="{StaticResource CollapsedToExpandedUpStoryboard}" />
-                                    <VisualTransition From="ExpandedUp" To="Collapsed" GeneratedDuration="0:0:0.150" Storyboard="{StaticResource ExpandedUpToCollapsedStoryboard}" />
-                                    <VisualTransition From="Collapsed" To="ExpandedDown" GeneratedDuration="0:0:0.300" Storyboard="{StaticResource CollapsedToExpandedDownStoryboard}" />
-                                    <VisualTransition From="ExpandedDown" To="Collapsed" GeneratedDuration="0:0:0.150" Storyboard="{StaticResource ExpandedDownToCollapsedStoryboard}" />
+                                    <VisualTransition From="Collapsed" To="ExpandedUp" Storyboard="{StaticResource CollapsedToExpandedUpStoryboard}" />
+                                    <VisualTransition From="ExpandedUp" To="Collapsed" Storyboard="{StaticResource ExpandedUpToCollapsedStoryboard}" />
+                                    <VisualTransition From="Collapsed" To="ExpandedDown" Storyboard="{StaticResource CollapsedToExpandedDownStoryboard}" />
+                                    <VisualTransition From="ExpandedDown" To="Collapsed" Storyboard="{StaticResource ExpandedDownToCollapsedStoryboard}" />
                                 </VisualStateGroup.Transitions>
                                 <VisualState x:Name="Collapsed">
                                     <Storyboard>
diff --git a/ModernWpf.Controls/ContentDialog/ContentDialog.xaml b/ModernWpf.Controls/ContentDialog/ContentDialog.xaml
index 36826322..c6629f3f 100644
--- a/ModernWpf.Controls/ContentDialog/ContentDialog.xaml
+++ b/ModernWpf.Controls/ContentDialog/ContentDialog.xaml
@@ -25,51 +25,56 @@
                         <VisualStateManager.VisualStateGroups>
                             <VisualStateGroup x:Name="DialogShowingStates">
                                 <VisualStateGroup.Transitions>
-                                    <VisualTransition To="DialogHidden" GeneratedDuration="0:0:0.5">
+                                    <VisualTransition To="DialogHidden">
                                         <Storyboard>
-                                            <BooleanAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="SnapsToDevicePixels">
-                                                <DiscreteBooleanKeyFrame KeyTime="0:0:0" Value="False" />
-                                            </BooleanAnimationUsingKeyFrames>
-                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="Visibility">
-                                                <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{x:Static Visibility.Visible}" />
-                                            </ObjectAnimationUsingKeyFrames>
-                                            <BooleanAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="IsHitTestVisible">
-                                                <DiscreteBooleanKeyFrame KeyTime="0:0:0" Value="False" />
-                                            </BooleanAnimationUsingKeyFrames>
-                                            <DoubleAnimationUsingKeyFrames Storyboard.TargetName="ScaleTransform" Storyboard.TargetProperty="ScaleX">
-                                                <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="1.0" />
-                                                <SplineDoubleKeyFrame KeyTime="0:0:0.5" KeySpline="0.1,0.9 0.2,1.0" Value="1.05" />
-                                            </DoubleAnimationUsingKeyFrames>
-                                            <DoubleAnimationUsingKeyFrames Storyboard.TargetName="ScaleTransform" Storyboard.TargetProperty="ScaleY">
-                                                <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="1.0" />
-                                                <SplineDoubleKeyFrame KeyTime="0:0:0.5" KeySpline="0.1,0.9 0.2,1.0" Value="1.05" />
-                                            </DoubleAnimationUsingKeyFrames>
-                                            <DoubleAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="Opacity">
-                                                <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="1.0" />
-                                                <LinearDoubleKeyFrame KeyTime="0:0:0.083" Value="0.0" />
-                                            </DoubleAnimationUsingKeyFrames>
+                                            <!-- Using a nested Storyboard to work around https://stackoverflow.com/questions/5002501 -->
+                                            <Storyboard>
+                                                <BooleanAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="SnapsToDevicePixels">
+                                                    <DiscreteBooleanKeyFrame KeyTime="0:0:0" Value="False" />
+                                                </BooleanAnimationUsingKeyFrames>
+                                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="Visibility">
+                                                    <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{x:Static Visibility.Visible}" />
+                                                </ObjectAnimationUsingKeyFrames>
+                                                <BooleanAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="IsHitTestVisible">
+                                                    <DiscreteBooleanKeyFrame KeyTime="0:0:0" Value="False" />
+                                                </BooleanAnimationUsingKeyFrames>
+                                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="ScaleTransform" Storyboard.TargetProperty="ScaleX">
+                                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="1.0" />
+                                                    <SplineDoubleKeyFrame KeyTime="0:0:0.5" KeySpline="0.1,0.9 0.2,1.0" Value="1.05" />
+                                                </DoubleAnimationUsingKeyFrames>
+                                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="ScaleTransform" Storyboard.TargetProperty="ScaleY">
+                                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="1.0" />
+                                                    <SplineDoubleKeyFrame KeyTime="0:0:0.5" KeySpline="0.1,0.9 0.2,1.0" Value="1.05" />
+                                                </DoubleAnimationUsingKeyFrames>
+                                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="Opacity">
+                                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="1.0" />
+                                                    <LinearDoubleKeyFrame KeyTime="0:0:0.083" Value="0.0" />
+                                                </DoubleAnimationUsingKeyFrames>
+                                            </Storyboard>
                                         </Storyboard>
                                     </VisualTransition>
-                                    <VisualTransition To="DialogShowing" GeneratedDuration="0:0:0.5">
+                                    <VisualTransition To="DialogShowing">
                                         <Storyboard>
-                                            <BooleanAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="SnapsToDevicePixels">
-                                                <DiscreteBooleanKeyFrame KeyTime="0:0:0" Value="False" />
-                                            </BooleanAnimationUsingKeyFrames>
-                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="Visibility">
-                                                <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{x:Static Visibility.Visible}" />
-                                            </ObjectAnimationUsingKeyFrames>
-                                            <DoubleAnimationUsingKeyFrames Storyboard.TargetName="ScaleTransform" Storyboard.TargetProperty="ScaleX">
-                                                <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="1.05" />
-                                                <SplineDoubleKeyFrame KeyTime="0:0:0.5" KeySpline="0.1,0.9 0.2,1.0" Value="1.0" />
-                                            </DoubleAnimationUsingKeyFrames>
-                                            <DoubleAnimationUsingKeyFrames Storyboard.TargetName="ScaleTransform" Storyboard.TargetProperty="ScaleY">
-                                                <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="1.05" />
-                                                <SplineDoubleKeyFrame KeyTime="0:0:0.5" KeySpline="0.1,0.9 0.2,1.0" Value="1.0" />
-                                            </DoubleAnimationUsingKeyFrames>
-                                            <DoubleAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="Opacity">
-                                                <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="0.0" />
-                                                <LinearDoubleKeyFrame KeyTime="0:0:0.167" Value="1.0" />
-                                            </DoubleAnimationUsingKeyFrames>
+                                            <Storyboard>
+                                                <BooleanAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="SnapsToDevicePixels">
+                                                    <DiscreteBooleanKeyFrame KeyTime="0:0:0" Value="False" />
+                                                </BooleanAnimationUsingKeyFrames>
+                                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="Visibility">
+                                                    <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{x:Static Visibility.Visible}" />
+                                                </ObjectAnimationUsingKeyFrames>
+                                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="ScaleTransform" Storyboard.TargetProperty="ScaleX">
+                                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="1.05" />
+                                                    <SplineDoubleKeyFrame KeyTime="0:0:0.5" KeySpline="0.1,0.9 0.2,1.0" Value="1.0" />
+                                                </DoubleAnimationUsingKeyFrames>
+                                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="ScaleTransform" Storyboard.TargetProperty="ScaleY">
+                                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="1.05" />
+                                                    <SplineDoubleKeyFrame KeyTime="0:0:0.5" KeySpline="0.1,0.9 0.2,1.0" Value="1.0" />
+                                                </DoubleAnimationUsingKeyFrames>
+                                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="Opacity">
+                                                    <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="0.0" />
+                                                    <LinearDoubleKeyFrame KeyTime="0:0:0.167" Value="1.0" />
+                                                </DoubleAnimationUsingKeyFrames>
+                                            </Storyboard>
                                         </Storyboard>
                                     </VisualTransition>
                                 </VisualStateGroup.Transitions>
diff --git a/ModernWpf/ProgressBar/ProgressBar.xaml b/ModernWpf/ProgressBar/ProgressBar.xaml
index c146df83..5cfdbc4e 100644
--- a/ModernWpf/ProgressBar/ProgressBar.xaml
+++ b/ModernWpf/ProgressBar/ProgressBar.xaml
@@ -28,14 +28,15 @@
                         SnapsToDevicePixels="True">
                         <Grid.Resources>
                             <Storyboard x:Key="UpdatingToDeterminateStoryboard">
-                                <DoubleAnimationUsingKeyFrames Storyboard.TargetName="DeterminateProgressBarIndicator" Storyboard.TargetProperty="(UIElement.RenderTransform).(TranslateTransform.X)">
-                                    <DiscreteDoubleKeyFrame KeyTime="0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.IndicatorLengthDelta}" />
-                                    <SplineDoubleKeyFrame KeyTime="0:0:0.367" Value="0" KeySpline="0.1,0.9 0.2,1" />
-                                </DoubleAnimationUsingKeyFrames>
+                                <!-- Using a nested Storyboard to work around https://stackoverflow.com/questions/5002501 -->
+                                <Storyboard>
+                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="DeterminateProgressBarIndicator" Storyboard.TargetProperty="(UIElement.RenderTransform).(TranslateTransform.X)">
+                                        <DiscreteDoubleKeyFrame KeyTime="0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.IndicatorLengthDelta}" />
+                                        <SplineDoubleKeyFrame KeyTime="0:0:0.367" Value="0" KeySpline="0.1,0.9 0.2,1" />
+                                    </DoubleAnimationUsingKeyFrames>
+                                </Storyboard>
                             </Storyboard>
-                            <Storyboard
-                                x:Key="IndeterminateStoryboard"
-                                RepeatBehavior="Forever">
+                            <Storyboard x:Key="IndeterminateStoryboard" RepeatBehavior="Forever">
                                 <DoubleAnimationUsingKeyFrames Storyboard.TargetName="IndeterminateProgressBarIndicator" Storyboard.TargetProperty="(UIElement.RenderTransform).(TranslateTransform.X)">
                                     <SplineDoubleKeyFrame KeyTime="0" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.ContainerAnimationStartPosition}" KeySpline="0.4, 0.0, 0.6, 1.0" />
                                     <SplineDoubleKeyFrame KeyTime="0:0:1.5" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.ContainerAnimationEndPosition}" KeySpline="0.4, 0.0, 0.6, 1.0" />
@@ -161,21 +162,25 @@
                             <VisualStateGroup x:Name="CommonStates">
 
                                 <VisualStateGroup.Transitions>
-                                    <VisualTransition From="Updating" To="Determinate" GeneratedDuration="0:0:0.367" Storyboard="{StaticResource UpdatingToDeterminateStoryboard}" />
-                                    <VisualTransition From="Paused" To="Determinate" GeneratedDuration="0:0:0.25">
+                                    <VisualTransition From="Updating" To="Determinate" Storyboard="{StaticResource UpdatingToDeterminateStoryboard}" />
+                                    <VisualTransition From="Paused" To="Determinate">
                                         <Storyboard>
-                                            <DoubleAnimation
-                                                Storyboard.TargetName="DeterminateProgressBarIndicator"
-                                                Storyboard.TargetProperty="Opacity"
-                                                To="1"
-                                                Duration="0:0:0.25" />
+                                            <Storyboard>
+                                                <DoubleAnimation
+                                                    Storyboard.TargetName="DeterminateProgressBarIndicator"
+                                                    Storyboard.TargetProperty="Opacity"
+                                                    To="1"
+                                                    Duration="0:0:0.25" />
+                                            </Storyboard>
                                         </Storyboard>
                                     </VisualTransition>
-                                    <VisualTransition From="Error" To="Determinate" GeneratedDuration="0:0:0.25" />
-                                    <VisualTransition From="Indeterminate" To="Determinate" GeneratedDuration="0:0:0.167">
+                                    <VisualTransition From="Error" To="Determinate" />
+                                    <VisualTransition From="Indeterminate" To="Determinate">
                                         <Storyboard>
-                                            <animation:FadeInThemeAnimation TargetName="IndeterminateProgressBarIndicator" />
-                                            <animation:FadeInThemeAnimation TargetName="IndeterminateProgressBarIndicator2" />
+                                            <Storyboard>
+                                                <animation:FadeInThemeAnimation TargetName="IndeterminateProgressBarIndicator" />
+                                                <animation:FadeInThemeAnimation TargetName="IndeterminateProgressBarIndicator2" />
+                                            </Storyboard>
                                         </Storyboard>
                                     </VisualTransition>
                                 </VisualStateGroup.Transitions>