I've been testing out Artrage, and there were a couple of issues that make it unusable for me.

For example, when I paint with a square/flat head oil brush, decreasing the stylus pressure results in the brush size tapering, which shouldn't happen, because I'm not using a pointed sable brush, and there's no setting to turn off that behavior. This is a huge problem because if I want to have a broad flat stroke that I gradually decrease the pressure to blend the current color on the brush with the color already on the canvas, I can't do it with the full width of the brush, as the brush head will taper and become smaller, resulting in a line. I don't know if this is just with my setup (using Xencelabs tablet), but if my pressure sensitivity is working fine, I don't see why this would happen.

Also, brush designer doesn't work--I can't see any brushstrokes in the brush testing window, no matter how I change the settings. Any stroke I make leaves no marks in the brush testing window.

Am I doing something wrong, or these are bugs?