I use Disqus comments on this site, and I just had a problem where I kept getting the error "Disqus seems to be taking longer than usual. Reload?" with no comments or text entry box. I'm using Firefox 16.0.2, and I don't have any extra plugins enabled. A few are installed, but only the defaults are on. I read on the Disqus forum that it could be because of too many plugins (not here), slow internet (definitely not here!), and slow webserver (not here). The only other possibility, which is what I discovered was my problem, is a corrupted Firefox profile.