Active camo graphics problem

[jib]

I've got a dell inspiron 600m with an intel radeon graphics card (i cant remember exactly what card) and theres a problem with the active camo.
Invisible stuff is all the same color as the top left pixel in the screen, instead of being the color of whats behind it.
i've found that putting -useff on the command line fixes the problem but if you put -useff then specular and shadows dont work.
Has anyone else noticed this and does anyone have any ideas to fix it?