192.168.0.135 is my FREENAS box IP. It started giving this error after upgrading to 9.2.1.7 x64.
Aug 15 01:00:46 FREENAS nmbd[2991]: STATUS=daemon 'nmbd' finished starting up and ready to serve connectionsbecome_local_master_fail2: failed to register name WORKGROUP<1d> on subnet 192.168.0.135. Failed to become a local master browser.
Aug 15 01:00:46 FREENAS nmbd[2991]: [2014/08/15 01:00:46.406211, 0] ../source3/nmbd/nmbd_namelistdb.c:320(standard_fail_register)
Aug 15 01:00:46 FREENAS nmbd[2991]: standard_fail_register: Failed to register/refresh name WORKGROUP<1d> on subnet 192.168.0.135
Aug 15 01:00:46 FREENAS nmbd[2991]: STATUS=daemon 'nmbd' finished starting up and ready to serve connectionsbecome_local_master_fail2: failed to register name WORKGROUP<1d> on subnet 192.168.0.135. Failed to become a local master browser.
Aug 15 01:00:46 FREENAS nmbd[2991]: [2014/08/15 01:00:46.406211, 0] ../source3/nmbd/nmbd_namelistdb.c:320(standard_fail_register)
Aug 15 01:00:46 FREENAS nmbd[2991]: standard_fail_register: Failed to register/refresh name WORKGROUP<1d> on subnet 192.168.0.135