Comment 112 for bug 563100

There is an additional patch upstream:
http://bugs.freedesktop.org/attachment.cgi?id=33939
Without it I still get random cursor freezes on ANY video card trying to use Xinerama. I've tested this on 10 or so machines in my company and this weekend I've applied it to all 150 which use a mix of nvidia twinview, matrox xinerama, and various single head displays. I will report back in a few days on stability but I'm pretty sure its good to go.