Adding "Domain Users" to a local Windows group fails.
Adding works with samba-3.0.1
The passdb backend is ldapsam_compat
The log contains many strange LDAP searches:
smbldap_search: base => [o=GAD], filter =>
[(&(uid=/bin/bash)(objectclass=sambaAccount))], scope => 
Created attachment 413 [details]
level 10 log
This was fixed in 3.0.2a
sorry for the same, cleaning up the database to prevent unecessary reopens of bugs.