Suddenly brushes and gradients are very pixelated
Hi
I have a problem: All of a sudden when using soft brushes and gradients on transparent backgrounds, everything gets these really pixelated edges, as if the pencil tool is selected instead of the brush (it's not), or it the setting is dissolve (it's not).

Top left is the standard round brush on transparent background. Right is gradient black to transparent. Middle bottom is a zoomed in on black soft round brush. All of these are on a fresh install with the settings and preferences deleted and resetted. I've tried several different versions of photoshop, same problem in all. I'm freaking out here, can't work. What I'm missing?
