http://bugs.winehq.org/show_bug.cgi?id=29844
--- Comment #28 from Jeremy Huddleston jeremyhu@freedesktop.org 2012-03-20 12:44:08 CDT --- I'd suggest pulling in these two:
XQuartz: Use doubles for input valuators XQuartz: Xi: darwinPointer is now Relative
The second one should be enough, but I'd like to get extra testing on the first one, so if you're willing to be guinea pigs, you might as well go all the way.