Can't tell the difference on a MacMini2,1 w/ Safari 5.latest – both sides jerk a bit sometimes, but are mostly smooth-looking. Maybe if I blew it up to full-sc

Can't tell the difference on a MacMini2,1 w/ Safari 5.latest – both sides jerk a bit sometimes, but are mostly smooth-looking. Maybe if I blew it up to full-screen it would show a noticeable difference. Reminded me of a BeOS demo, where windows would send each other messages about own position and the ball's physics.