samba - Aug 2003 - power failure causes domain not found problem

folks, we had a stable samba (version 2.2.5) running on redhat8 providing
pdc services to a group of, primarily, windows xp pro clients. we 
experienced
a power failure and subsecuently these xp clients are complaining about a
"duplicate hostname on the network" and are then report that "the
system can
not log you on because the domain FOO is unavailable"

the log.nmbd contains the following error about failing to register
the domain name:

[2003/08/17 14:11:25, 0] 
nmbd/nmbd_nameregister.c:register_name_response(109)
  register_name_response: server at IP 192.168.100.74 rejected our name 
registration of CAI<00> with error code 5.
[2003/08/17 14:11:25, 0] nmbd/nmbd_workgroupdb.c:fail_register(219)
  fail_register: Failed to register name CAI<00> on subnet UNICAST_SUBNET.
[2003/08/17 14:11:25, 0] nmbd/nmbd_namelistdb.c:standard_fail_register(290)
  standard_fail_register: Failed to register/refresh name CAI<00> on 
subnet UNICAST_SUBNET

your experience and help would be greatly appreciated in understanding and
resolving this problem.

thanks,

daryl