This is the WebKit side of http://code.google.com/p/chromium/issues/detail?id=92247. So far I've only identified one affected location.
Created attachment 103429 [details] Patch v1
Comment on attachment 103429 [details] Patch v1 Clearing flags on attachment: 103429 Committed r92751: <http://trac.webkit.org/changeset/92751>
All reviewed patches have been landed. Closing bug.