From Winbeta.org:
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Well gang, after much speculation, we have learned that the final build # of WinXP SP1 will be 1105.1
Not much more info on the final build at this moment, but we do expect to see it at your favorite suger shack within 24 hrs. Funny, some (no names mentioned) have said it's been pushed back by 10 days or more. I suspect they are reading AOL forums.
See ya soon!
WinBeta.org