...you have a camera that is functioning properly. I went through 3 1D MkI's before I got one without a defect, and I went through 2 MkII's so far, with the third one on the way. I understand your frustration, but I would take a working (even if slightly used) MkII over a new yet less-than-functional. That is just me, though. Another thing to consider (maybe it was already mentioned- I didn't read all the replies)- your CF card is what determines the number that is displayed. And to add to the other replies I did read, my 1Ds had dust on the sensor right out of the box. Just one of those things, I guess. I would keep it and keep shooting, but again that is just me. Good luck!
-Ken
-Ken