A set of classes that can be used to arbitrarily rotate and flip icons.
  normal
  fa-rotate-90
  fa-rotate-180
  fa-rotate-270
  fa-flip-horizontal
  fa-flip-vertical
{% highlight html %}   normal
  fa-rotate-90
  fa-rotate-180
  fa-rotate-270
  fa-flip-horizontal
  icon-flip-vertical {% endhighlight %}

Rotating and flipping icons aren't yet supported in IE7.