Cintiq issue: Calibration or Defective?

[Jim Campbell]

I'm breaking in my shiny new Cintiq, and I've noticed a problem with it: when I draw a straight line, as it goes into the bottom 3/4in of the screen the line bumps several pixels to the left. I didn't notice at first, since you tend to draw in the middle of the screen and the first couple of times it happened, I thought it was my useless, shaky hands, but this happens every time I draw a line that crosses into that bottom section of the screen.

So… am I missing something in the calibration settings, or do I need to return this Cintiq as faulty?

Thanks for any advice!

Cheers

Jim