Mac OS 8.6, NW 6 sp3

user can log in fine but if they try to change their password they get

"your password could not be changed please try again or see your

Other times it will say something about the password is incorrect or
logins have been disabled, neither of which is correct.

Thing is, the same old/new password combination will work fine when
logging in and changing the password from Mac OS 9.2