For some reason the "back to top" link in Disqus (v. 2.2) has been working inconsistently in Firefox and Chrome lately.

I'm not having problems with it in Safari or IE 7 or 8 (although in IE it's never scrolled completely to the top of the page, just to the top of my content).

This is a new problem for me, seemingly occurring out of nowhere. Could be conflict with another plug in, I guess.

Is anyone else noticing this problem "back to top" problem in Firefox and Chrome? And, if so, do you know what is causing the problem, or what I could do to fix it?