Just got back from a trip to Cleveland, and played the usual Ms.Pac-Man / Galaga Reunion machine in the bus station. (The fire button is pretty screwed, in case anyone is heading there.) Anyway, I noticed that the screen has significant Ms.Pac burn in! On a machine just a few years old!! Anyway, I was pretty surprised.
P.S. - I hate that continue feature, makes the high scores meaningless...