Just thought I'd throw my suggestion into the mix, a browser called 'Avant'
I've been trying it out on my Win XP system for a few days now and it is smooth as silk, just get rid of the floating tools and a couple of tweaks in the settings and you are good to go.
I've never hit so many dings with this browser (which I use exclusiviely for WGT only).
http://www.avantbrowser.com/download.aspx?uil=en-gb