Re: Database Broke
govnor, I would say: install tiki (the same version) in local, and through phpmyadmin or similar check table users_users, in order to compare it with the table you have in your broken installation.
That would give you more hints , I guess, about where might the problem be...
Maybe it's just some field that you need to hack in your db, that by some misterious reason it's missing for you.
HTH