Well, the simplest way to find out would be to try and draw on paper... though the surface is a bit different then a tablets, if the line is still shakey, then it probably isn't the tablet ^^Though considering a tablet is an electronic piece of equipment, I can see it getting a bit faulty, or maybe a bit too accurate... I have the worst problem drawing line on my DS for the starfox game I play because it is too accurate (though the pixelly line doesn't help...)I find I can also hide some line shakiness in my drawings if I start by scanning my stuff in really big, then shrinking it down considerably, although I'm not sure working huge is the best answer if your computer doesn't have much RAM... Most of the time I have problems with my computer freezing when I get a picture that is a little too big...