Heh, I have no problem whatsoever with Anisotropic Filtering, and while I can adjust AA via Radlinker, without an in-game switch I have no real way of determining whether or not the graphics have improved vs. a performance hit.
I'm really more concerned about the Frame Buffer Effects, but the fact that AA is grayed out as well leads to the theory that the two problems are related, and I'd like to figure out what the problem is so that I can solve it!
Naturally, I sent an email to Lucasarts's Tech Support before my original post, but I have as much confidence in getting any reply (let alone a helpful one) as a zookeeper leaving with a clean outfit after monkey duty.