Bugfix release addressing docs, CSS, and some JavaScript issues. Key changes include:

• Docs:
  • Assets (illustrations and examples) are now retina-ready.
  • Replaced Placehold.it with Holder.js, a client-side and retina-ready placeholder image tool.
• Dropdowns: Temporary fix added for dropdowns on mobile to prevent them from closing early.
• Popovers:
  • No longer inherits font-size: 0; when placed in button groups.
  • Arrows refactored to work in IE8, and use less code.
  • Plugin no longer inserts popover content into a <p>, but rather directly into .popover-content.
• Labels and badges: Now automatically collapse if they have no content.
• Tables: Nesting support with .table-bordered and .table-striped greatly improved.
• Typeahead:
  • Now inserts dropdown menu after the input instead of at the close of the document.
  • Hitting escape will place focus back on the <input>.
• Print styles, from HTML5 Boilerplate, have been added.

See more on the 2.2.2 milestone.