Hi there,
I just installed an ATI HD 6770 graphics card, installed latest Catalyst drivers, and June 2010 DX9 (per this thread). I run Win7 64 bit.
However, my plate armor that used to appear mirrored now looks like white plastic (screenshot taken on "Balanced" performance):

It still has some reflection, but it doesn't have the right reflective quality.
I even tried turning performance to "Extreme Quality" briefly, and it still looks like white plastic armor. So it's not some setting that's tuned too low.
Any ideas what's wrong?
Another computer in our home has this same model of graphics card (but different Windows version and other components), and my armor looks correctly mirror-like, so I know the graphics card is capable of it.
Thanks!