sorry to barge in but i've the same problem and it's annoying as hell, your site is too damn usefull to my guild so i've invested some time to investigate the "why it doesn't update the page when i click on the button" problem.
hope this helps.
system configuration : Vista 64 FireFox 3.0.5 addons loaded that intercept http : AdBlock plus, no-script
configuration of the addons : adblock plus : standard block list delivered with the addon. noscript : domain wide allow for "wow-heroes.com" noscript : domain wide deny for "google-analytics.com"
check is the google analytic script have really been merged into the context by null-testing the "_gat" global before trying to use it. modify ajax button's script to null-test if the "pageTracker" variable have been initialised.