http://bugs.winehq.org/show_bug.cgi?id=20608
--- Comment #1 from Juan Lang juan_lang@yahoo.com 2009-11-07 20:04:40 --- An X crash is certainly a driver bug. Whether Wine (or Warcraft) triggered it is sort of beside the point: you need to log a bug with them.
That said, you imply (but don't state) that this didn't happen with an earlier version of Wine. If that's true, a regression test might help us at least understand the problem better: http://wiki.winehq.org/RegressionTesting