Oh snap I didnt know that! But then again I have been tweaking my cvars a lot so how can you tell what exactly is very high settings? Ah anyway I am not touching that game again until I get a pair of nvidia's next gen vid cards
Specifically AF doesn't work in conjunction with parallax occlusion mapping. Use the console command "r_usePOM 0" to disable it if you want to be sure, but it is only active by default when you set shaders to very high.