Calibration doesn't work for me in any application so far. It is interesting though that while the apps I've tried are starting a normal cursor shows and tracks perfectly until the app cursor appears, from that point the stylus moves the cursor with a strange offset. If I start in the top left corner of the screen and move toward the bottom right the cursor moves further and further ahead of the stylus until it sticks in the corner, then repeats in reverse if I go back to the top left. It is like the cursor position needs to be downscaled to the DOS applications screen resolution?