Ok. I've compiled and ran the program using a freshly compiled 0.9.56. The entire output is available at http://docs.google.com/View?docid=df8c5djt_2zqvd3df2. Y axis is still inverted. I only get the divide by zero error messages when drawing using the tablet. There's another small oddity that I've missed last time; when I take the stylus off of the tablet, a line is drawn vertically up/down to the centre of the screen. Turning off opacity varying on pressure made this more apparent. I'll try and get an image up somewhere of what the canvas looks like when all this happens. I downloaded, installed and ran ArtRage in this version of wine also, and the tablet there works perfectly, with pressure etc.. so it seems to be localised to openCanvas.
