I’m on 32.03. I tried bookmarking Freerepublic, and it appeared to work, but the bookmark didn’t show up on the list. However, if I try to add the bookmark again, it doesn’t offer the option, only “Edit this Bookmark”.
However, I already had a bookmark for Freerepublic. So I tested it on Lucianne.com and was able to bookmark that page with no problem, as I had no pre-existing bookmark.
So maybe the issue is just that FF won’t display duplicate bookmarks?
Did you make a folder in your bookmarks for certain sites? If so, when you bookmarked, you may have accidentally added it to that folder, in which case it would not show up at the bottom of your generic list of bookmarks.