http://bugs.winehq.org/show_bug.cgi?id=21405
--- Comment #5 from James Gilliland neclimdul@gmail.com 2010-01-19 00:57:05 --- Glibc seems like a reasonable possiblity. F12 has glibc 2.11 and F11 had 2.10. So seems like everyone is seeing it with the update to 2.11.
The glibc changelog for 2.11 shows " Checking version of longjmp added that fails if an uninitialized stack frame would be created." which could be interesting if we can trace back to where this is happening. http://sourceware.org/ml/libc-alpha/2009-10/msg00063.html
I'll try to downgrade glibc to 2.10 this week and see if I can confirm the problem goes away.