I know that this is a known error that was fixed by a patch around v3.09, but I
am using a newer version and am still having the same (or similar error). 

Following configuring Samba, ran `net join` and `wbinfo
--set-auth-user=administrator%'passwd'`, I revceive the following error when
running `wbinfo -u`:

Error looking up domain users

When running `wbinfo -g` a list of BUILTIN groups are returned. I did locate
references for a fix in the list archives, but was apparently for pre 3.0.9
versions of Samba.

smb.conf:

[global]
        workgroup = UNICITY
        netbios name = ITT-BATKINS4
        security = DOMAIN
        printcap name = cups
        disable spoolss = Yes
        show add printer wizard = No
        idmap uid = 15000-20000
        idmap gid = 15000-20000
        winbind use default domain - Yes
        printing = cups
[homes]
        comment = Home Directories
        valid users = %S
        read only = No
        browseable = No

nsswitch.conf:

passwd: files winbind
shadow: files
group:  files winbind
hosts:          files dns winbind
networks:       files dns
services:       files
protocols:      files
rpc:            files
ethers:         files
netmasks:       files
netgroup:       files
publickey:      files
bootparams:     files
automount:      files nis
aliases:        files

OS: OpenSuSE 9.3 kernel 2.6.11.4-21.9-default
Samba Version: Version 3.0.13-1.1-SUSE
 
I have not seen any errors related to samba/winbind in the logs. I don't see a
debug option wth winbind to provide more output. Please tell me what I can give
to you to provide more information.

Thanks.