Differences in Flash between IE and Mozilla

I’ve written a gallery in AS 3 and it works fine and as it should when I view it with IE(both 7 and 6), but when I view it with Mozilla(2.0.0.7) it hardly works at all.

Are there differences in the plugins for the different browsers and can I get information somewhere about what those differences are?

If anyone is interested in the problem it’s viewable here. Click on the “Lightbox” button in the menu. If you are using IE it’ll show preloaders and then thumbnails, in Mozilla it only shows the preloaders but the thumbnails wont show but are still “clickable”.

Thanks in advance.