Hia,
Not sure if this is just on my end or universal. When I apply the motionmove transition, I get a vertical shape between the transition and often it doesn't go to the next frame.
Visit the site at: http://www.astralize.com/site2
Go to the Motion section, since all those images are the same size.
I'm on a Mac and have tried with Safari and Firefox.
Here is a screenshot of how the error looks on my end.
http://www.astralize.com/error.png
Cheers, Sameer.