Thanks for the quick reply, vapilot. Unfortunately. I've already tried both those options - or, almost. My company site can't handle IE7 (they told us not to install it "yet" - still waiting to see how "yet" will be), so I don't want to install 7 yet or I'll still be unable to get into my work site.
I did uninstall IE6 as you described and re-isntalled it from my WinXP CD. No result.