When I press F 3 times to go to full screen, it lies to me... I do have the zoom at 100%, and yet it will never be centered automatically, leaving black areas where the document ends, and I try to center it manually (by holding space and dragging with the mouse) but of course I can't get it pixel acurate.
More than that - it does this stupid behaviour, where if I draw to the edge of the screen, and press again, it scrolls the document in that direction by about 10 pixels. What kind of retarded canvas randomly moves around under the artists brush?!?! A nude body paint model being naughty maybe. Decidely less entertaining when it's a computer canvas.