[Samba] server drops out of the network 'hood

[kaze]

Every so often my workgroup member Samba file and print server drops out of
the network 'hood from my Windows clients point of view. When I restart nmbd
(or is it smbd?) via SWAT the box shows up again and all is well. Why does
this happen and what to do about it? Also I think these daemons don't start
automatically in the rare event of a reboot - is there some connection
there?

- kaze