http://bugs.winehq.org/show_bug.cgi?id=23301
--- Comment #11 from Alexey Loukianov mooroon2@mail.ru 2011-09-11 01:32:49 CDT --- Still present as of Wine 1.3.28.
Can't reproduce this Steam behavior inside WinXP VirtualBOX VM and on laptop running Windows 7 x32 Starter Edition, so I still tend to treat this behavior as Wine bug.