Situation: You load an external swf and render it to a bitmap. On rollover, you tell it to go to another frame, and rerender it, to get the rollover image from the loaded swf. If you do this by giving it a label (gotoAndStop(“over”)), it will miss the new frame half of the time, and render the old frame. If you give it a frame number instead (gotoAndStop(2)), it’s spot on each time.
This phenomenon does not occur all the time. It might be related to CPU obsession / possession.