Assume you have a page with a video element, child of a content node, flowed in a region. Put the video in fullscreen. After you exit full screen, webkit crashes.
Created attachment 228848 [details] Patch
Created attachment 228938 [details] Patch for landing
Comment on attachment 228938 [details] Patch for landing Clearing flags on attachment: 228938 Committed r167001: <http://trac.webkit.org/changeset/167001>
All reviewed patches have been landed. Closing bug.