Looks like disable is calling enable!
Related: <rdar://problem/16682376>
Created attachment 229853 [details] [PATCH] Proposed Fix
Comment on attachment 229853 [details] [PATCH] Proposed Fix Clearing flags on attachment: 229853 Committed r167647: <http://trac.webkit.org/changeset/167647>
All reviewed patches have been landed. Closing bug.