Could you please provide steps to reproduce this issue, such as an URL, or a test case?
Steps to Reproduce:
1. Go to http://www.hulu.com/watch/34770/fringe-the-same-old-story#x-0,vepisode,1
2. Click the fullscreen button.
3. Press esc or click the button to leave fullscreen.
Now the window is no longer key. A quick look at the file menu will demonstrate the incorrect keyboard shortcuts.
OK. Hulu refuses to open, because it doesn't like where I live, but I'm pretty sure that it actually uses Flash for playback, so this is a duplicate of bug 22225.
*** This bug has been marked as a duplicate of 22225 ***