I have a tablet and every time I try to draw, it drags around... kinda hard to explain but even after I lift the pen, it continues drawing unless I lift my hand twelve feet in the air.
Ummm can't explain it very well, but it looks like this:
I've tried restarting the computer and pulling out the little nib and tapping the pen a few times (not sure why but google says to do this). It happens on both SAI and Gimp and I'm really frustrated. It has actually been happening for over a year just some days it's manageable and other days it's completely useless.