[Samba] Strange entries in logfiles

[Bart Haezeleer]

Recently I discovered some strange entries in my logfiles.
Theses entries appears in /var/log/messages and /var/log/samba/log.nmbd
...
Nov  2 17:27:32 pc00 nmbd[1093]:
[2003/11/02 17:27:32, 0]
nmbd/nmbd_incomingrequests.c:process_name_refresh_request(183)
process_name_refresh_request: unicast name registration request received for
name MYDOMAIN<00> from IP IP_CLIENT on subnet UNICAST_SUBNET.
[2003/11/02 17:27:32, 0]
nmbd/nmbd_incomingrequests.c:process_name_refresh_request(184)
Error - should be sent to WINS server
...
Nov  2 17:27:32 pc00 nmbd[1093]:
[2003/11/02 17:27:32, 0]
nmbd/nmbd_incomingrequests.c:process_name_refresh_request(183)
process_name_refresh_request: unicast name registration request received for
name USERNAME<03> from IP IP_CLIENT on  subnet UNICAST_SUBNET.
[2003/11/02 17:27:32, 0]
nmbd/nmbd_incomingrequests.c:process_name_refresh_request(184)
Error - should be sent to WINS server

This is my global-section of smb.conf
[global]
add user script = /usr/sbin/useradd -d /dev/null -g NTMachines -s
/bin/false -M %u
admin users = @ntadmin
bind interfaces only = Yes
create mask = 0750
domain admin group = @ntadmin
domain logons = Yes
domain master = Yes
encrypt passwords = Yes
interfaces = IP_SERVER/24
local master = Yes
lock directory = /var/spool/samba
logon script = genlogon.bat
logon path = \\%N\profiles\%u
max xmit = 32767
message command = sh -c '/usr/local/samba/bin/winpopup %f %m %M %s' &
os level = 64
passwd program = /usr/bin/passwd %u
passwd chat = New\sUNIX\spassword* %n\n *Retype\snew\sUNIX\spassword* %n\n
passwd chat debug = Yes
preferred master = Yes
printer admin = @ntadmin
read size = 8192
security = user
server string = Redhat 7.1 running Samba %v
socket options = IPTOS_LOWDELAY TCP_NODELAY
username map = /etc/samba/smbusers
unix password sync = Yes
write list = root
writeable = Yes
workgroup = MYDOMAIN

Does anyone know which options causes theses entries?
My system is a RedHat 7.1 upgraded 2.2.1a and later to 2.2.8a
All with RPMs found on RPMFIND.NET