Patch to follow. Should have set explicit hight and not rely upon font size.
Created attachment 71003 [details] [PATCH] Proposed fix.
Comment on attachment 71003 [details] [PATCH] Proposed fix. Clearing flags on attachment: 71003 Committed r69954: <http://trac.webkit.org/changeset/69954>
All reviewed patches have been landed. Closing bug.