[Samba] Samba + LDAP

[Ricardo Manuel Esteves (VI)]

Hi,

I got samba 3.0.26a on my Fedora 7, and when i try to add users with
smbpasswd -a username, it only works if the user exists as a linux
user... i got a Centos 4.4 system with samba 3.0.10 and it  works even
if the user doesn't exists on the system.

Can anyone explain me why this happens? is it from this new version
(3.0.26a) or may be a problem of 
Fedora 7?