http://bugs.winehq.org/show_bug.cgi?id=3837
------- Additional Comments From xerox_xerox2000@yahoo.co.uk 2006-15-06 14:10 ------- here's another app that can be used to test: ftp://ftp.avault.com/demos/dhunt2005_demo.exe Looks like validatevertexshader takes indeed 5 parameters, but validatepixelshader takes 4.