Running on a wisp here...

Look at your source. Is one the 'jackets and vests' really alt text for an image?
If the image is missing, the alt text would show. IE and FF may differ on how they apply styles to it.

Otherwise, in the source find the two lines-look for <!-- comment --> code and search for that in the Developers Toolkit (last box, search Catalog) to track down where the two items are being added.

If you post a link it would be easier-we can look at the source itself.

-Ng_