twitter/bootstrap — pull request #4166 by jonathansampson (2012-07-24 05:56:55+00:00)
Title: IE10 uses 'transition' and 'transitionend'

msTransition, while supported in IE, should be ignored in favor of the
unprefixed property. Additionally, MSTransitionEnd should also be
ignored in favor of the unprefixed event transitionend.

Current unit test requires no attention in light of this change.

MSDN:
http://msdn.microsoft.com/en-us/library/ie/hh673535(v=vs.85).aspx#transitions_dom_events