http://bugs.winehq.org/show_bug.cgi?id=18351
--- Comment #6 from Ken Sharp kennybobs@o2.co.uk 2010-05-30 17:38:51 --- Still present in 1.2-rc2.
Tried the instructions in http://wiki.winehq.org/Backtraces but winedbg still won't pick up a backtrace.