Wasn't it sshelby who wrote:

>I am happy with this animation except for one thing: When the ball is moving
>across the screen, it has a double image. If you stop the action, the
>individual frame is clearly defined, no double image. I have spent hours
>experimenting with every variable I can find, like resolution, frame rate,
>bit rate, compression rate, etc. I have tried several AVI compression
>schemes, and have tried four different video editing programs. I have other
>MPG animations that were done the same way as this one, and none of them
>have the problem. Do any of you experts out there have any suggestions?
>Steve Shelby

I would have guessed that frame rate would be the decisive factor.

The frame rate of 30 would probably look good on an old American
monitor, where the screen refresh rate was half the mains frequency, and
you'd get one frame per screen refresh. These days, however, fancy
monitors have refresh rates that are higher and vary depending on the
screen resolution. 

On my monitor, the 1280x1024 resolution runs at 60Hz, and I reckon that
it should look much better with the screen set to that resolution.
Unfortunately, setting the resolution that high on my machine eats a
little bit too much CPU power for me to be able to run your animation at
full speed - the achieved rate varies between about 24 and 27fps, so the
effect is still visible.

Have you checked whether it runs at the full frame rate on your machine?
It might possibly be that the other animations that looked OK had less
processing, and therefore might have been able to run at full speed. In
Windows Media Player the achieved frame rate is displayed by right-
clicking and choosing "Statistics".

-- 
Mike Williams
Gentleman of Leisure

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