The website i run: www.wranglernews.com ... has a few online advertisements in the forms of box ads and banner ads. My issue is that on a few computers (very few, but still some), the graphics don't show. There isn't even a broken image or the HTML code itself. I use UnFREEz to animate... but have also tried Adobe ImageReady and gotten the same results. Anyone have any ideas?

Hmmm, i would consider using flash rather. The animations work here so im not too sure what you mean.

Wish i could be more helpful