MY dealer has this and it showed my rear driverside wheel to be out of alignment - at 2800 miles. I don't recall hitting anything that would have done this, so I'm a bit wary about how calibrated and accurate these machines are. I saw a worker cleaning the sensor of the machine with a towel while I was there, which also has me scratching my head. Dealer wanted 199 for the alignment, and I felt sort of coerced to do it because then if I don't, and something happens that requires a fix, I won't hear the end of it with them.
I was at the dealer for the first service, so I had them do the alignment there. Service took 6.5 hours and I was livid. They brought in other vehicles ahead of mine (I was one of the first at the dealer that morning) and were just generally slow. Then, after the service, they performed the alignment, and now my steering wheel isn't properly centered to the vehicle. I noticed this while leaving the dealer and driving it around the block a few times. I drove back to the dealer to have it fixed and still the same thing. After spending 7 hours that day, i just drove it home and called the service advisor to bring it in another day. First service and just the dealer in general has got me pretty pissed so far.