http://bugs.winehq.org/show_bug.cgi?id=7164
------- Additional Comments From wurzin@ywave.com 2007-04-02 15:25 ------- I recently was having this exact same issue.
Everything worked up to the point when you were to (after loading) enter the world. It would crash.
I tried a few things; Got the latest version of Wine, changed my video drivers (NVidia) version. During the last which was changing the video driver versions I had to turn off gdm. I started X again afterwords (without rebooting) and it just so happened that a different window manager was the default. I started up WoW and bang, everything worked perfectly. I thought "Hmm... wonder if it had something to do with the window manager", so I tried running it in enlightenment and had the exact same problem again. Ran it in a shell, or twm, or Windowmaker (the only other window managers I tried) and it worked perfectly every time.
Goes to show, sometimes reducing the environment to it's simplest level is a good starting position.
Hope this helps someone. I'm sure glad I'm able to play without issues. :)
Cheers.