Photoshopping Bullshit

I'm using a Wacom Intuos 2 that I've had for awhile. I keep getting these weird jagged edges when doing smooth circles (as seen below). My tablet is free of dirt or grit, and I have the default settings going in PS including the smoothing option on the brush tool.


I opened the same size canvas in CS2 and did a similar experiment to make sure it wasn't a "steady hand issue", but there were no jaggies.



Now suddenly, I'm having the same problem in CS2 as well. I've installed the latest drivers from Wacom which seemed to fix the problem initially. But now it's still screwing up.

Jam it back in, in the dark.

I haven't changed the way I'm drawing at all.

How ya doing, buddy?