http://bugs.winehq.org/show_bug.cgi?id=24515
--- Comment #4 from Matteo Bruni matteo.mystral@gmail.com 2010-11-12 08:55:04 CST --- (In reply to comment #3)
Does it set WS_CLIPCHILDREN on the window? This may be similar to bug 15232.
Yes, it seems to be mostly a duplicate of bug 15232. The patch there helps, some draw glitches remain but they probably are a different problem.