QuickTime movies can be saved with meta data that causes them to loop automatically. HTML5 has its own loop attribute, so WebKit should disable QuickTime's automatic looping behavior.
<rdar://problem/8048863>
Created attachment 65863 [details] Proposed patch
Attachment 65863 [details] did not build on win: Build output: http://queues.webkit.org/results/3828122
Created attachment 65864 [details] Updated patch
http://trac.webkit.org/changeset/66395