Hey,
I get these messages with samba:
nmbd/nmbd_nameregister.c: register_name_response(109)...
register_name_response: server at IP 192.168.0.2 rejected our name
registration of BOBAPHET with error code 6 .... then standard_fail_register:
failed to register/refresh name BOBAPHET on subnet 192.168.0.1 ...
find_response_record: response packet id 17865 received with no matching
records ... what could be the problem?

Here's my [GLOBAL]:
[GLOBAL]
workgroup = FRISCO
netbios name = FRISCO
server string = FreeBSD 4.8-Stable - Samba %v
interfaces = ed1
security = USER <--- It was share before, put it to user
encrypt passwords = yes
min passwd length = 6
null passwords = No
log level = 10
log file = /var/log/samba.log
timestamp logs = Yes
socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
preserve case = yes
public = yes
guest ok = no
password level = 1
deadtime = 15
dont descend = /dev,/proc,/root,/stand

The computers on the lan are comps running WINXP...

Thanks