samba doesn't start with sane config, can't connect to itself

Testing the AMI RC image for EC2. At testcase ec2_014.

Samba was just cleanly installed using 'sudo apt-get update && sudo tasksel --section server' and selecting 'Samba server'.

It seems that the testcase fails with NT_STATUS_UNSUCCESSFUL when the system's samba client tries to connect to the server running on the same system:

ubuntu@ip-10-251-105-239:~$ smbtree
Enter ubuntu's password:
WORKGROUP
 \\IP-10-251-105-23 ip-10-251-105-239 server (Samba, Ubuntu)
cli_start_connection: failed to connect to IP-10-251-105-23<20> (0.0.0.0). Error NT_STATUS_UNSUCCESSFUL

Additionally, on startup of smbd, it seems that something else is holding the socket/address that samba is expecting. Here is an excerpt of /var/log/samba/log.smbd right after 'sudo /etc/init.d/winbind stop; sudo /etc/init.d/samba restart':

[2009/10/23 00:55:11, 0] smbd/server.c:1068(main)
  smbd version 3.4.0 started.
  Copyright Andrew Tridgell and the Samba Team 1992-2009
[2009/10/23 00:55:11, 0] smbd/server.c:456(smbd_open_one_socket)
  smbd_open_once_socket: open_socket_in: Address already in use
[2009/10/23 00:55:11, 0] smbd/server.c:456(smbd_open_one_socket)
  smbd_open_once_socket: open_socket_in: Address already in use

And log.nmbd:

[2009/10/23 00:55:11, 0] nmbd/nmbd.c:854(main)
  nmbd version 3.4.0 started.
  Copyright Andrew Tridgell and the Samba Team 1992-2009
[2009/10/23 00:55:11, 0] nmbd/nmbd_nameregister.c:491(register_name)
  register_name: NetBIOS name IP-10-251-105-239 is too long. Truncating to IP-10-251-105-2
[2009/10/23 00:55:11, 0] nmbd/nmbd_nameregister.c:491(register_name)
  register_name: NetBIOS name IP-10-251-105-239 is too long. Truncating to IP-10-251-105-2
[2009/10/23 00:55:11, 0] nmbd/nmbd_nameregister.c:491(register_name)
  register_name: NetBIOS name IP-10-251-105-239 is too long. Truncating to IP-10-251-105-2
[2009/10/23 00:55:34, 0] nmbd/nmbd_become_lmb.c:395(become_local_master_stage2)
  *****

  Samba name server IP-10-251-105-239 is now a local master browser for workgroup WORKGROUP on subnet 10.251.105.239

  *****