http://bugs.winehq.org/show_bug.cgi?id=19986
--- Comment #14 from Dmitry Timoshkov dmitry@codeweavers.com 2010-01-06 04:44:00 --- That particular problem was probably fixed by http://www.winehq.org/pipermail/wine-cvs/2009-October/060217.html
Still, an X11 crash is not a Wine bug.