This image might help you visualize what occurs internally with Flash Player AV2M on each frame: http://www.craftymind.com/wp-content/uploads/2008/04/marshalledsliceexport.png
And this is the article at length: http://www.craftymind.com/2008/04/18/updated-elastic-racetrack-for-flash-9-and-avm2/ But basically, if you have, for example, a loop in your code that changes the Y position of a bunch of clips and you step line-by-line through your code with the debugger, it will iterate over the clips one by one without anything changing on screen - even though their Y positions are being changed. This is because all code for that one specific frame within your flash movie must first execute before the screen will render any changes. It's a 1-2 process; All code for a frame, then all rendering (drawing) for a frame. This may be what you are talking about. SF. _______________________________________________ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders