Javascript error with IE9 on Windows 7N Windows 7 KN and Windows Server 2008 (RC2)

[DerHexer]

Windows 7N and KN (ans also Windows Server 2008 & RC2) are throwing an Javascript exception when trying to play the html5 videos. This prevents the video from playing.
This does not happen with normal Win7 version.

This ist due to http://msdn.microsoft.com/en-us/ie/ff959805.aspx (see Known Installation Issues)

"The Windows 7 N and KN Editions do not contain media related technologies such as video playback. IE9 is designed to support HTML5 video playback functionality which is only supported in Windows versions that contain media related technologies. Therefore, on Windows 7 N and KN Editions, Internet Explorer 9 will not be able to install prerequisite KB2454826 or KB2483177 unless the Windows Media Feature Pack (KB 968211) is installed, resulting in no HTML5 video playback. In order to enable HTML5 video playback support on a Windows 7 N or KN, install KB986211 and KB2483177 before installing Internet Explorer 9."

This leads to a JS error when trying to test for canplaytype. Modernizr also had this problem until they pushed a fix to prevent this JS error:
Modernizr/Modernizr@b51f17b

medialementjs should not throw an JS error either and instead fallback to the next video-file (or flash).
Please fix this error as it prevents medialementjs to work properly on all IE9 versions.