Linux – winbind from samba 3.6.3 on Linux works but does not integrate with OS

Successfully compiled and installed the latest version of samba.

Started winbindd and the following diagnostic commands work:

wbinfo -p, wbinfo -c, net ads testjoin, etc…

However! when using built-in Linux command like id or when using pam with pam_winbind module to login. They fail and there is nothing in the logs referring to winbind. What could be the issue?

e.g.
[root ~]# wbinfo -i testuser
testuser:*:10708:1513:Test User:/home/domain.ad/testuser:/bin/bash
but !
[root ~]# id testuser
id: testuser: No such user


Note: previous versions (samba 3.5.x) worked well on our systems so it's not bad domain or configuration.

/etc/nsswitch.conf:

passwd: files winbind
shadow: files winbind
group: files winbind
hosts: files dns wins
bootparams: nisplus [NOTFOUND=return] files
ethers: files
netmasks: files
networks: files
protocols: files
rpc: files
services: files
netgroup: nisplus
publickey: nisplus
automount: files nisplus
aliases: files nisplus