Rounded Stroke Bug with Intuos4 and Intuos5 tablets
See if you have this bug, I tested it on 2 computers and I noticed the same behavior.
By default the click threshold is a bit low, so you need to change it, but watch how it reacts in Photoshop. The sensitivity is rather bad. Worse is if you try modifying your grip pen preferences it changes the quality of the line.
This affects the intuos4 and intuos5 tablets, but I suspect any other device like the Cintiqs with 2048 levels of pressure sensitivity.
Im just so happy you guys figured out the smoothing shoelace thing, that was doing my nut! Ive only got a cheapo Bamboo so didnt think I had much of a leg to stand on re compaining, but its so good to be able to get reasonable strokes. So thanks!