Do you have JavaScript ticked in Tools, Options, Content? Does the issue take place in safe mode? Does the issue happen in another browser for you now?

You don't have to disable any addons or extentions!!!You guys are not going to believe this I figured out the problem it's really dumb...ok here goes the attachment uploader loads seperate so I got to thinking it's a popup so I went to options content and under block pop ups there is an option exceptions click on that and in the box type www.firefox.com and hit allow pow its fixed!!!!! :-)