Probably a result of <http://trac.webkit.org/projects/webkit/changeset/20974>.
Fixed with r20991.
Created attachment 14119 [details] Patch for this bug and bug 13429 Reviewed by Adam on IRC. Landed by Mark Rowe. Why am I even bothering with posting the patch now?
(In reply to comment #2) > Created an attachment (id=14119) [edit] > Patch for this bug and bug 13429 > > Reviewed by Adam on IRC. Landed by Mark Rowe. Why am I even bothering with > posting the patch now? > Because you're a crazy son of a gun, that's why!