Bit of a novice at Flash, but hopefully someone can help with my query. For reference I'm using Flash 5.5, Action Script 3.0 & 24 FPS.

My problem: I'm exporting my animation to Quicktime, when I play back (in quicktime) there is a glitch in the video, this occurs when a rectangle moves across the screen, part of the stroke (from the rectangle) is replicated and left behind. Sort of creating a shadow effect. When I view the animation in Flash this issue does not occur, its also not a problem when I publish the animation.

Slightly urgent issue, if anyone can help it would be massively appreciated! Thanks.