joomla/joomla-cms — pull request #2725 by okonomiyaki3000 (2013-12-24 02:24:56+00:00)
Title: set the X-UA-Compatible header to IE=edge

Because of this: http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=32396&start=0