At:
http://www.microsoft.com/windows/ie
It's a Release Candidate, it means it's no longer a beta, this is likely the version that will be the official one, so there is no harm in installing it.
Obviously, do this only if you have a legal Windows XP with Service Pack 2... it needs genuine windows to work.
I've been using this for a while now... I was on the way to switch to FireFox, this one convinced me to come back to IE. ![]()