UBB.threads PHP Forum Software Community Forums UBB.classic UBB.classic 6 Support Before I install ubb6 can I?

The extra profile fields being used by some of your hacks in the member profiles may cause a problem. If your UBB does not work after the upgrade, you will need to remove the extra profile fields from the profiles.

As far as I know you cannot revert back to the old scripts after upgrading.