non-root users cannot use smbpasswd...

[Paul Hewitt]

...we are running a samba-2.0.6 server on a Sun
E3000, to provide file and print service (but not
logon service) to users on PCs.  It works fine
except for an enormously annoying problem:
ordinary (nonroot) users are not able to change
their own samba passwd.  When a user invokes
smbpasswd he or she gets the following response:

euler$ /usr/local/samba/bin/smbpasswd
Old SMB password:
New SMB password:
Retype new SMB password:
machine 127.0.0.1 rejected the tconX on the IPC$
share. Error was : ERRSRV - ERRbadpw (Bad password
- name/password pair in a Tree Connect or Session
Setup are invalid.).
Failed to change password for phewitt

Help!  We have over 800 users come and go each
semester, and this overworked administrator cannot
change everyone's passwd for them!  Any ideas may
be useful...