User disappeared during update error

[Ron (Lists)]

I did a upgrade to FreeBSD 9 a few weeks ago and just started using it, 
and when I try and create a new user, I get the follow:

pw: user 'todd' disappeared during update
adduser: ERROR: There was an error adding user (todd).

I first noticed this issue when trying to install postfix and got a 
similar error.

Anyone know what this is or how to fix it without a complete 
re-install?

Ron