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
, 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 .
Print styles, from HTML5 Boilerplate, have been added.
完整列表请看 https://github.com/twitter/bootstrap/issues?milestone=17&state=closed
下载：https://github.com/twitter/bootstrap/zipball/master
我们还将发布一个 2.2.3 版本，因为还有一些问题没法在 2.2.2 中解决，然后接下来大部分的工作会放在 3.0 版本的开发上，更多的细节我们将在下周提供。
来自:开源中国社区