You running a 5870 on 9.10 drivers? I tried installing those today, I got a "INF file not found" error (which is the northbridge filter), couldnt get the drivers installed.
I figured it was because 5800 cards needed 9.11. I dunno, this is my first ATI card.
Anyway, got mine running without hardware shaders, I ran il2setup exe, and disabled vertex shaders, and vertex extensions. Then set ingame video landscape to excellent instead of perfect. Perfect enables the hardware shaders, and things get funky. It sure doesn't look as good as it should, but its running, and text isnt corrupted.
Too bad, one of my favorite games, might have to shelve it and wait for SOW, it will run in dx11.
Other than that, I'm loving this 5850 card, image quality is way better than nvidia which is all I've ever had before. And its FAST.