http://bugs.winehq.org/show_bug.cgi?id=25595
--- Comment #9 from Jeff Zaroyko jeffz@jeffz.name 2010-12-23 00:49:28 CST --- Source engine games aren't really a wide range of applications in the context of all the applications which exist, but let's not worry too much about that.
I suggest you test with an earlier version of Wine to determine if this is a regression, if it is then you can run a regression test to help find why this has happened http://wiki.winehq.org/RegressionTesting