Patch coming soon. When checking if ancestors clip the hit-testing point, we are accidentally checking all layers, instead of only layers that actually clip something.
Created attachment 155614 [details] Patch
Comment on attachment 155614 [details] Patch R=me
Comment on attachment 155614 [details] Patch Clearing flags on attachment: 155614 Committed r124270: <http://trac.webkit.org/changeset/124270>
All reviewed patches have been landed. Closing bug.