i am a bit fed up. Bought my iMaclast week from Trafford centre apple store. Took it back last night to exchange it for the upgraded model they hadn't told me about. The store is a one hour drive away, so 2 hour trip. Set it al lup today and its got a mark under the glass on the screen. Not a dead pixel, a definite mark so they said bring it back in to be looked at?? What do i do? Another 2 hour trip again?? Could the next one have dead pixels and be worse? this one is in the top right, and appears on everything!!!! i want Apple to sort me out somehow.