Fang, thank you for the reply!
I am using the most updated version of both browsers (1.02 for Firefox? just updated two days ago, and 6 for IE).
Both have been updated two days ago, though they both ran with this difference before updates.
Possibly it is my machines? I have tested it on three different computers with nearly the same results, Firefox runs at the same speed but shows image tearing on the image. (The part that is within the other image moves at a different speed than the part outside the image).
A better example would be here
where the images are rather large files as compared to the ones you are looking at.
***************Added 03/30/05 4:39 PM PST***********
Also, please forgive the lack of a direct link to my script source earlier, sometimes I forget when I use external files...