Preview. The banding is pretty odd (the bands have gradients _within_ them, it's weird), and is also displaying artifacts from OS X's default window-transparen

Preview. The banding is pretty odd (the bands have gradients _within_ them, it's weird), and is also displaying artifacts from OS X's default window-transparency settings. Turning those "down" helps, a bit, but there's still banding. I don't see an option to turn it off completely. So I'm not sure where to point the finger.