http://bugs.winehq.org/show_bug.cgi?id=24826
--- Comment #2 from Jerome Leclanche adys.wh@gmail.com 2010-10-20 15:16:52 CDT --- (In reply to comment #1)
Have you tested it on windows? May be an application bug.
Positive it doesn't happen on windows; it crashes in mere minutes, while on Windows I've had absolutely no crash report with shadows enabled.