Muhahahah beta rc2 build 2149 i'd bet
I did the full upgrade on NT 4sp4 Server with IIS4 and Proxy2 running. I always uninstall ANY viri protection during upgrades just saves tons of headaches!
Lo and behold i spent 8 hours just hunting down and doing the hot fixes to get Proxy back up and running. Then i suffered a worse fate no support for any zip or sparQ drives!
So needless to say 36 hours later a uninstall happened and back to NT4.
Wow there will a slight learning curve for system admins on Win 2000k
Wow how slow can M$ make something go!