animated gif won't work in safari ...

I put an animated gif in iWeb and it runs fine in the site in Windows IE 7 and Firefox 3.5, and on my Mac in Firefox, But you can just see the initial frame in Safari.
Actually I put two on there, the little flag works (has a transparent layer over it to make it clickable), but the bigger one, with 13 layers, does not.

Is there something in Safari that I need to set?

http://www.widman.biz/Corvair/English/English.html

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