Hey all, I haven't seen this addressed by anyone else so I thought I'd bring it up as it's become an impasse for me.
For the record, I'm using CS3 and a very outdated Graphire tablet.
I've tried every setting tweak, and the whole spectrum of pen movement (fast, slow, holding it different ways, more arm movement v. more hand movement), and no matter what my lines are invariably wavy or jittery unless a stroke is made very quickly, and thus haphazardly and inaccurately. This is especially true if I'm working at 50% zoom, or so help me 25%, where even remotely clean looking curves are actually hideous, stair-step blocks at actual viewing size.
I figure the latter is normal, but what on earth can I do to keep my digital art from looking like an epileptic howler monkey got a hold of my tablet? I don't have this problem with traditional pencil-and-paper drawing, so perhaps it's a friction thing, or the plastic cover of my tablet is a little too scratched up. I can't for the life of me seem to improve this without using large brush sizes not suitable for line art. Gah.
I'll post an example if I'm not being clear, I'm running on two cylinders.