As the question explains, some of the icons for visited sites appear only as a dashed rectangle. There are several bookmarks that have been successfully imported from an html file and a few of them have no icon showing on the Firefox toolbar or bookmark list yet they did on the original browser where they wre imported from. Typically, the icons will "fill in" when each of the imported sites are visited some some do not regardless of how many times visited. I have checked to make sure that the fonts and colors are being selected by the site/server so that is not the problem. Although it is a somewhat cosmetic feature (navigation works fine, just no icons), the icons make site recognition much faster visually, making browser that much faster and easier on the eye. Any help to resolve this issue would be greatly appreciated for a "second-time-around" Firefox user.