Twice last night I had a major glitch with the full version. Both times, I stopped being able to apply any pressure with any tool except for the crayon. The problem was preceeded by the eraser on my stylus not working properly anymore (it had the same function as the pen tip). I use a Wacom Intuos3, but I couldn't even make dark lines using the mouse. This problem persisted over creating new paintings and even through restarting ArtRage. The only way I was able to correct it was to delete the ArtRage settings file in Documents and Settings. The first time the problem occured, I was working with an imported png. The second time, I was testing out the layer blending options.