http://bugs.winehq.org/show_bug.cgi?id=31861
--- Comment #20 from Berillions berillions@gmail.com 2012-10-10 15:06:43 CDT --- (In reply to comment #19)
I install Wine from latest GIT. My Steam isn't work with it. I make new wineprefix and new steam prefix, and... it works! I don't know how to make it work with my old wineprefix with many games installed.
For your Steam Games, it explains here : http://appdb.winehq.org/objectManager.php?sClass=version&iId=19444
Copy your "SteamApps" folder in a safe place, remove your actual prefix, re-install Steam and copy "SteamApps" in your new prefix.