I have a fairly simple flash animation that has a curious problem in playback. Essentially there are five objects that animate across the screen, one after the other, at a medium to fast pace. Simple enough. The problem is that, during playback, when the objects are animated horizontally, from left to right, the playback is jittery and the images kind of step across screeen. I tried this animation (same objects, same speed of movement) and animated them from top to bottom, and they look fantastic during playback. Any thoughts?