Well I hate to be a noobie spoil sport but I don't think UBB should have changed the USERID in the first place.
I'm not sure what the overall affect would be now, but if you've not opened your board back up yet and you have a list of all the old users then you should be able to reset the numbers, but that would require someone like Rick who knows all the affected fields so they all get reset correctly to their old posts as well and PM , etc..
It would take some direct SQL statements to do it, but I'm sure it could be done.
We lost all Moderators and Admins and were able to recreate them and get back their posts so it's possible.
