http://bugs.winehq.org/show_bug.cgi?id=17565
--- Comment #16 from Fab netfab@gmail.com 2010-07-17 02:59:46 --- (In reply to comment #15)
So, the question is: is this bug caused by something in the Wine, or it is just the software error that was fixed by Valve in newer releases of Source engine, but still remains in the old GldSource engine?
I think it's a problem in wine. I remember playing Half-Life without this problem with (very) old versions of wine.