http://bugs.winehq.org/show_bug.cgi?id=7229
--- Comment #13 from Bleeter Yaluser winehq-bugzilla@bleeter.id.au 2008-01-15 19:50:11 --- I'd certainly state for the record that it appears the 'bug' is far more common upon exiting from the world back to the character selection screen. I seem to recall I've also had it when porting to another continent, or upon entering/exiting instances, but for me the logging out of a character certainly trips this up more often than not.
This may be because I have quite a few UI mods for the game, and when the exit character routines start, the game saves all the UI info back to disk. This makes me wonder if the hang may be related to some IO thing - albeit this is merely a guess based upon no evidence whatsoever.