samba - Feb 2005 - nbns broadcast problem *<00><00><00><00><00><00><00><00><00><00><00><00><00><00><00>

I have a samba server that intermittently broadcasts netbios name
queries for
*<00><00><00><00><00><00><00><00><00><00><00><00><00><00><00>
for around
3 seconds, taking out virtually all other network communication.
 
 
Here is one of the packets:
 
No.     Time        Source                Destination           Protocol
Info
2385639 1531.790940 192.168.5.200         192.168.5.255         NBNS
Name query NB
*<00><00><00><00><00><00><00><00><00><00><00><00><00><00><00>
 
Frame 2385639 (92 bytes on wire, 92 bytes captured)
Ethernet II, Src: 00:c0:49:d8:da:3c, Dst: ff:ff:ff:ff:ff:ff
Internet Protocol, Src Addr: 192.168.5.200 (192.168.5.200), Dst Addr:
192.168.5.255 (192.168.5.255)
User Datagram Protocol, Src Port: 32944 (32944), Dst Port: netbios-ns
(137)
NetBIOS Name Service
 
 
 
 
Any help would be much appreciated.
 
Lee Baker