I'm seeing a lot of (check_reduced_name) entries in the samba.log
Looked into the Samba Bug 7409 and checked my log level wasn't too low. Was on 3 and still getting the problem.
One thing I can think of was when I upgraded the Antivirus was in operation but was removed in the upgrade process.
I did see it was available in the software components so I might add it again and see how things go.
UPDATE: Installed the Antivirus module and now zentyal mondules wont start on startup. Antivirus, DNS, NTP and Domain Controller and File Sharing. Network seems operational along with DCHP - will test further otherwise I'm faced with rolling back to 3.2
Has anyone downgraded from the most current one or have they just rolled back a backup or reinstalled Zentyal?