Like lmckenzie, I use win 2000 and Slimbrowser. It's basically a new front end for IE6, but it adds about a million extra options over the standard IE, including tabbed browsing, middle click, etc. It can also switch on/off java, activeX, etc with one click. Very nice browser. It can even open all the sites used in your last session if you want.

I've tried firefox, Opera, etc, and don't like any of them. When I see a browser with a Google search bar that I can't get rid of, I'm immediately turned off.

mac