Safari: Mac top page has some videos. During playback "Watch the iPad 2" video, click "Full screen" button. The movie does not played at full screen mode and the tabs of HP and movie list is shown on the top of the movie.
Created attachment 92194 [details] Patch
<rdar://problem/9270031>
Comment on attachment 92194 [details] Patch r=me
Comment on attachment 92194 [details] Patch Transforms also create stacking context, so you should reset those too.
Committed r85811: <http://trac.webkit.org/changeset/85811>