http://bugs.winehq.org/show_bug.cgi?id=11903
--- Comment #10 from Vitaliy Margolen vitaliy@kievinfo.com 2008-12-19 09:19:04 --- (In reply to comment #9) Wrong, that bug is for Solaris. This is for Linux.
Remove your ~/.wine directory and reinstall Steam. See troubleshooting guide on AppDB page for Steam.