samba - Feb 2006 - domain master query

I have setup a samba server for my home network, 2x kubuntu PCs and a work XP 
laptop.

In syslog I get ...

Feb 12 07:25:10 localhost nmbd[6233]: [2006/02/12 07:25:10, 0] 
nmbd/nmbd_browsesync.c:find_domain_master_name_query_fail(353)
Feb 12 07:25:10 localhost nmbd[6233]:   find_domain_master_name_query_fail:
Feb 12 07:25:10 localhost nmbd[6233]:   Unable to find the Domain Master 
Browser name OFFICE<1b> for the workgroup OFFICE.
Feb 12 07:25:10 localhost nmbd[6233]:   Unable to sync browse lists in this 
workgroup.

There is no domain master browser, jut my 'subnet' of 192.168.0.* Is
this
someting I should just ignore or is it possible to turn off samba looking for 
it. Or very possibly have I made a configuration error in smb.conf ?

Dave

smb.conf a work very much in process ...

[global]
    comment = Samba Server

    netbios name = DAVE
    server string = %v on %L

    workgroup = OFFICE
    wins support = yes
    security = user

    # Give Samba more authority in elections as master browser
    prefered master = yes
    os level = 255

    # Max permissions for a share
    create mode = 0666
    directory mode = 0777

    # Only on my LAN
    hosts allow = 192.168.0.

    # Various system users and superusers cannot be forged for access
    invalid users = root bin daemon adm sync shutdown halt mail news uucp 
operator

    # Allow super users dave and vanda access to all
    # admin users = dave,vanda

    #oplocks = no

    # Setup logging
    syslog = 2
    log level = 2

    log file = /var/log/samba/log.%m
    max log size = 50
    debug timestamp = yes

[common]
    comment = Common Linux Directory
    path = /export/samba/common
    read only = no
    valid users = @smblinux

[windows]
    comment = M$ Directory
    path = /export/samba/windows
    read only = no
    valid users = @smbwindows

[archive]
    comment = Archive Directory
    path = /export/samba/archive
    read only = no
    valid users = @smblinux