http://bugs.winehq.org/show_bug.cgi?id=17530
--- Comment #7 from Nikolay Sivov bunglehead@gmail.com 2009-07-29 08:19:36 --- (In reply to comment #6)
netapi32 has a heap buffer overflow in the NETAPI_IsCurrentUser function, could this be the cause?
This should be fixed anyway, attach a patch here please.