http://bugs.winehq.org/show_bug.cgi?id=23602
--- Comment #2 from nrg753 nrg753@gmail.com 2010-07-12 02:49:16 --- I'll try to do some regression testing when I have time to do it, I've never done one before.
Once thing I've noticed now is that I had set Wine to "Windows 7" mode, but when run under XP mode Steam runs the same as always (like in previous versions of Wine).
So whatever this is, it's either something to do with Steam changing something when it detects what version of Windows it's running on (likely, could be webkit?) or it's something that Wine is doing when changing modes.