Cursor jumping around #2

Unlucky me...
I got my TC4400 back from the Service with a whole new screen and motherboard, and now - unlucky me... - the pen tip is the one causing the cursor jump and NOT the eraser as before. I was quite fine with not having an eraser as it solved my problems completely, but I'm pretty unsatisfied with not being able to use the pen tip, so I guess I'll have to do a big workaround and hope for the best.

As for differences, now the cursor jumps when it's caught by the pen too.