http://bugs.winehq.org/show_bug.cgi?id=23806
--- Comment #2 from lubosz lubosz@gmail.com 2010-07-27 08:07:05 --- It sometimes crashes with "Internal Battle.net Error" and sometimes with ACCESS_VIOLATION.
Funny thing is that sometimes I run it with WINEDEBUG=relay, I come to the login screen and the crash does not happen. This points to a race condition, as stated in IRC.