Created attachment 91287 [details] [review]
Workaround for the evergreen driver

A similar patch for the evergreen family. The bug was reproducible 100% of the
time in my case (by uploading a bunch of pictures using the image uploader on
photobox.com using Firefox 26) and that fixes / work around the problem. It's
hard to tell if there is any performance impact because it used to be crashing.
But using the aforementioned uploader now trigger high (>50%) CPU usage for
Xorg.