http://bugs.winehq.org/show_bug.cgi?id=25485
--- Comment #5 from GyB gyebro69@gmail.com 2010-12-11 14:53:35 CST --- I tested again the issue using the following method:
1) git checkout e9e58f07d2ca688bd14c27ec0b37d567416456ed (clean install of Wine and the game) >> no login window shown
2) git reset --hard HEAD^ (clean install of both Wine and the game) >> the login window is visible
It seems that's the 'offending' commit to me.