Thanks for the suggestion supton, I thought it could be a frame problem too, I didnt want to have to install the wheel to compensate for a frame problem on a new bike.
Another problem i've noticed is the rear brake is rubbing quite hard - enough to slow the wheel down fairly fast. I've wound the outside pad adjuster fully out and it is still rubbing the rotor. Tried another wheel and the same thing happens.
When I apply this brake, I can feel it "pulsing" - like one part of the rotor is grabbing and the other is sliding through. I cant tell if the rotor is warped because I cant see daylight on the outside edge. Could the rotor be a different thickness in one part?
When I bought this up at the bike shop along with the frame problem I was told I must be "going
over the bike with a fine tooth comb".
Scott.