I have seen others reporting the same. Pam_smbpass does not update LDAP NT/LM passwords when using ldapsam backend when changing a password using the Unix passwd command. This is not really a bug but it is a request for a feature in a category that is available throughout the rest of Samba, namely LDAP integration.
I have tried compiling samba 3.0.23c with ldap and with pam_smbpass.
Jerry, this isn't libsmbclient and isn't a blocker. I changed the severity and classified it as File Services, but I don't know to whom it should be assigned. You're as good a choice as anyone. :-)
Created attachment 2500
Pam_smbpass is obsoleted my pam_winbind now