https://bugs.freedesktop.org/show_bug.cgi?id=36421
--- Comment #6 from Tobias Jakobi liquid.acid@gmx.net 2011-05-17 09:57:27 PDT --- This issue was already present long before this particular commit, at least for me. It's also not strictly related to the HL2 engine, since I get the exact same problem with FEAR and its DX9 level renderpath.
I presume that r600g currently doesn't handle shader code that well that gets build by wined3d for certain shader configurations.