I just got off the phone with two people who I have testing all of the beta track versions for me now and they do not see the track or other textures being too sharp. They are running nVidia and ATI cards.
The only platform I personally cannot test on is MorphOS. So if this problem for others here also, please let me know. I have email contacts with some who are playing a couple of tracks for me on the MorphOS platform, but they too haven't made any observations regarding this particular problem. I am hoping it is only a contrast ratio display problem.
As far as AA being turned off, I test both of my G4 setups with AA off and don't notice a problem with the textures. Also, my Windows setups are the same.
As I have stated before, if anyone else here encounters this problem, let me know. I want to fix anything I can before the release.