Bootstrap 3.1 全新版本发布了，包含如下新特性：
Three new templates: Blog, Cover, and Dashboard.
#10884: Add
.infovariant to contextual table classes.#11138: Add contextual styles to list groups.
#11162: Add new sizes,
.modal-lgand.modal-sm, to modals for quicker settings on modals. Only applies to modals above the small breakpoint.#11193: Add
<kbd>element styles to indicate user input via keyboard.#11244: Add
.animation()mixins.#11572: Add contextual
background-colorclasses to match our existing text classes. (This also moves both sets of classes to the Helper Classes section of the CSS docs.)#11675: Add
.text-justifyclass to round out the text alignment classes.#11836: Add new form control feedback classes to toggle icons for each validation state. Works on regular forms, horizontal, and inline.
同时还包含多项其他包括 CSS 和 JavaScript 在内的改进，详情请看这里。
引用来自“小白小霸王”的评论
支持IE6了吗?
而且微软都放弃的东西，国外更没人会去支持它！
引用来自“小球球”的评论
Three new templates: Blog, Cover, and Dashboard.
i like it!