Well, I'm apparently havin the same problem a lot of other people are havin with the grooved rotors. Both back rotors have all kinds of pits and grooves in them. I just went to my dealer and made an appt. for monday at 9am, so hopfully it will all get figured out. The front rotors are smooth as can be, which seems strange, because i would think it would be the front rotors that would have problems, rather than the rear. Oh well, we'll see on monday.