I hadn't had my D90 a week before it began to lock up on me displaying ERR in the LED on top of the camera. I called Nikon several times to see if they could resolve the problem. Eventually they advised me to send it to their repair staff in New York. A move I will forever regret.
Oh why did I leave Canon. My next camera will be the Canon 5d mark ii. No more nightmares in dealing with the Nikon folks. At least I will know that my camera equipment will be fixed or replaced in a timely manor.