Changelog

v1.4.0

Updated tables to make no border the default and add options for condensed and bordered versions
Updated form states to expand on error styles and provide warning and success variations
New javascript plugin for button states
Switched to strict mode for Javascript plugins
Added more data attribute controls to our plugins
Full list of 25+ issues fixed: https://github.com/twitter/bootstrap/issues?milestone=6&state=closed

Javascript plugins for modals, alerts, dropdowns, scrollspy, tabs, tooltips, and popovers that work with jQuery and Ender
Massively updated docs for both the main page and for the new javascript plugins
Inline labels for marking inline content with key visual flags
Media thumbnails
Breadcrumbs

Added complete javascript page with detailed documentation for how to use plugins
Three complete example pages of using Bootstrap, linked from main docs page with thumbnails
Added section for compiling Less, for guidelines on how to recompile Bootstrap with Less
Added section for customizing grid variables in Less to roll your own grid system
Added section for code for using pre and code tags
Added section for form field sizes that match grid column sizes

Updated table styles to be just a tad bit more refined
Added new form input sizes based on the Bootstrap grid system (meaning now you can do input.span5 for a 280px-wide input)
Removed :focus states from :active links in Firefox
Fixed unqualified .clearfix in forms.less that added bottom margin to all containers
Updated .container() mixing to be .fixed-container() to prevent conflicts when compiling
Added focus states (either box-shadow or outline on :focus) to all buttons, links, and inputs
No longer require h3 in topbar, but still support for backwards compatibility

Dropdowns refactored to be extensible (now work in ul.tabs)
Added HTML5 form support by generalizing the form selectors (e.g., input instead of input[type=text|password])
Gradients back in IE, but removed rounded corners in IE9 to prevent background bleed on buttons and alert messages
Simplified the grid CSS by removing the static .span1-16 classes in favor of CSS-style regex for column styles in the grid
Added .one-third and .two-thirds columns to the grid system
Fixed bug in disabled buttons where they received :active styles
Bug fixes

Redesigned alerts to be more readable
Refactored buttons and alerts CSS to be simpler
Updated grid system to be more specific and not require .column or columns
Improved on specificity of CSS selectors by removing unnecessary tag and parent selectors
Miscellaneous updates to docs
Bug fixes

Added support for IE7 and IE8
Added examples directory with first example usage of Bootstrap for a simple website
Syntax fixes for gradients and color-stops
Miscellaneous updates to docs
Bug fixes