WebPlayer - Exiting fullscreen causes focus & performance problems.

Repro Steps:

1) Install normal webplayer then 64bit webplayer
2) Go to http://www.enhanceie.com/ua.aspx - download and run Internet Explorer 6 - restart browser
3) Launch Bootcamp demo - http://unity3d.com/gallery
4) Press "esc" to pause game and right-click "enter fullscreen"
5) Esc to exit fullscreen and observe a slight hang and lack of focus

Desired outcome: No hang or focus issues should be experienced.