samba - May 2006 - samba errors - "No buffer space available" - any ideas?

I am new to Samba, having just taken over management of a HPUX system in
a mainly Windows environment.  The system is running Samba 3.0.7.  I am
getting the following errors, repeatedly, in my log.smbd.  What does it
mean?  Is this actually a problem or normal chatter for Samba?  If it is
a problem, what should I do to correct it?

 
[2006/05/03 07:41:38, 0] lib/util_sock.c:set_socket_options(202)
  Failed to set socket option SO_KEEPALIVE (Error Invalid argument)
[2006/05/03 07:41:38, 0] lib/util_sock.c:set_socket_options(202)
  Failed to set socket option TCP_NODELAY (Error Invalid argument)
[2006/05/03 07:41:38, 0] lib/util_sock.c:get_peer_addr(1000)
  getpeername failed. Error was Invalid argument
[2006/05/03 07:41:39, 0] smbd/server.c:open_sockets_smbd(382)
  open_sockets_smbd: accept: No buffer space available

 Thanks for any help or advice,

Bill