Yes i've read here about a lot of trouble with that drive and AnyDVD. Maybe they will fix it with f/w update. I had some problems with my 20A1P and AnyDVD and also with other issues and KL0A fixed all my problems as far as i can find now. If you don't use LS much maybe you can cross flash to 20A1P KL0A and see if it helps but it will void your warranty.
I'm not sure how to cross flash but maybe someone else knows. It's the same hardware minus the LS.