For those of you who wish to have tabbed browsing and don't want to switch to Firefox for any reason, such as conflict with Norton or other reasons, then there is an alternative.

This is only for XP http://toolbar.msn.com/

Because of pressure from Firefox etc. Microsoft have decided to release a feature that will be included with IE7 when it is released. It is the MSN Browser bar which gives Tabbed Browsing and a few other useful add-ons(be sure to have a look at them).

Once you eliminate the unneccesary MSN stuff you may find it an attractive addition to IE. Considering the conflicts I had with Firefox, even though I liked it, I am finding this to be very good so far.