Cannot open bags while in combat

[runamonk]

[ADDON_ACTION_BLOCKED] AddOn 'Backpack' tried to call the protected function 'Backpack:Show()'.
!BugGrabber\BugGrabber.lua:519: in function <!BugGrabber\BugGrabber.lua:519>
[C]: in function Show' Backpack\core\Core.lua:268: in function Toggle'
Backpack\core\Blizzard.lua:4: in function `ToggleAllBags'
[string "OPENALLBAGS"]:1: in function <[string "OPENALLBAGS"]:1>

Locals:
InCombatSkipped

[p3lim]

I don't play the game any more, so this won't get fixed unless someone provides a patch.