silverstripe/sapphire — pull request #557 by adrexia (2012-06-21 04:29:09+00:00)
Title: BUGFIX: Media in IE9

IE9 appears to evaluate "if(media === null)" as false, because media === undefined.
media == null, is true, but the change in the commit (22de5c65979355752f2dbd9ca5b7f70265474742) was done to fix memory leaks that may have been occurring because of the double equals?