http://bugs.winehq.org/show_bug.cgi?id=17565
--- Comment #15 from Alexey Loukianov mooroon2@mail.ru 2010-06-09 12:36:15 --- Side note: meanwhile being fixed in HL2, looks like it is still present in all games based on older GldSource engine (first Half-Life series, original Counter Strike, e.t.c.). As being noted here, it is triggered by setting NumLock to the "On" state prior to starting up a game.
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?