OK, sounds like most likely is either warped rotor, or control arm bushings...
I'm very careful about not applying the parking brake after track sessions, and am careful not to use the brakes to hold in one place, but I guess a warped rotor is possible anyway.
I didn't think of control arm bushings... Normally I would think that unlikely since I only have 36K miles on the car, but that includes about 8 or 9 DE weekends, so I guess it's possible..
Art... You're thinking of AMS (Atlanta Motor Speedway)... Road Atlanta is "up" from Atlanta, not "down"... RA is in Flowery Branch, not far from Gainesville and almost next door to Chateau Elan winery.
2004 330Ci: Sport Pkg, TiAg, gray leather, UUC Swaybars, H&R Springs, Blistein shocks, UUC SSK, Autobaun miles (Euro.delivery)