http://bugs.winehq.org/show_bug.cgi?id=19986
--- Comment #8 from Dmitry Timoshkov dmitry@codeweavers.com 2010-01-03 04:43:19 --- (In reply to comment #7)
The is a real bug in wine: it sends invalid xrender glyph data to the X11 server and for some (but not all) video drivers this crashes the X server.
A user application should not be able to crash X server regardless what data it sends to it.