You know, when under a user's name it says "unregistered" for the registration date. Not like I would *ever* want to become one :)

When you've had a name change, your former self gets "unregistered".

I also think it 'might' apply if a former user has been banned?

If the user name was deleted. Normally we don't delete banned users.

Now it only becomes "unregistered" if a certain username is deleted. Changing your PDN does not make the old name unregistered like it did before we upgraded the board, now it simply changes it.