Unregistered

Has anybody else seen this? If I run the calibration routine on my T665 I can match the digitizer to the screen very accurately*right* at the points where the cross hairs appear. However, the upper-right section of the screen, some distance from where the three cross hairs appear during calibration, is a few pixels off. Is this a common problem? Do I have a bad Clie? It seems like there is some digitizer non-linearity... a calibration program that allowed multiple calibration points would solve the problem, but I don't know if such a thing exists...

Thanks for any insight!