Can't add new user in lucid

[Colin Law]

I seem to have found a bug in lucid but it is so basic that I hesitate
to report it in case I just being stupid.

I created a new user using System Administration Users and Groups but
am unable to login as that user.  I get an authentication error.  I
have tried creating several users and have double checked passwords
but to no avail.

In auth.log I see
piglet gdm-session-worker[2554]: pam_winbind(gdm:auth): request
wbcLogonUser failed: WBC_ERR_AUTH_ERROR, PAM error: PAM_USER_UNKNOWN
(10), NTSTATUS: NT_STATUS_NO_SUCH_USER, Error message was: No such
user

In addition in what may be a related or separate bug if I try to
change the password of the user fred using
sudo passwd fred
I get
passwd: System err
and in auth.log
Mar 26 12:50:28 piglet sudo:   colinl : TTY=pts/0 ; PWD=/home/colinl ;
USER=root ; COMMAND=/usr/bin/passwd fred
Mar 26 12:50:28 piglet passwd[2666]: pam_winbind(passwd:chauthtok):
valid_user: wbcGetpwnam gave WBC_ERR_DOMAIN_NOT_FOUND

I can't find either of these in launchpad.

Colin