Firefox won't load Yahoo attachment uploader in version 3.6.8

Yahoo mail has an attachment uploader that allows you to select multiple files (or pictures) for attachment. When installed, the link for attaching in a new message windos says "attach". When not installed, the link says "Attach files more easily". I have the attachment loader installed, but the link still says "Attach files more easily" in Firefox 3.6.8! I've tried re-installing the attachment uploader over and over, but when it tries to load it, it still ends up indicating that it's not installed ("Attach files more easily"). I tried it in Internet Explorer and it works, but not in Firefox 3.6.8

I went and removed Firefox 3.6.8 and installed Firefox 3.5.7 and the attachment uploader works. 3.6.8 seems to have a bug that won't let me load and use the attachment uploader!