High Res textures were bugged but there was a workaround someone found... but I can't find the link I had. reddit has it covered a few places where it was confirmed that high & medium were the same, but low-med were different.

IIRC ATI has to alter the config.ini file. There's some way to force high-res textures, too. Tom's Hardware had a link about it I think. From Tom's I guess I saw the high-rez texture thing somewhere else.

Awesome, thanks for this.