samba - Mar 2004 - Problem with stale smdb processes when users log out

I'm running Samba 3.0.0-15 (default install) on a Fedora FC1 machine. 
I've attached the smb.conf file below. The Samba server is acting as a 
WINS server on our testlab network, but is not a PDC, nor is it joined 
into a domain. Users authenticate by using a username/password that is 
local to the Samba server.

The problem I'm seeing is that when a user has been connected to the 
Samba server and then logs out of their Windows machine, the connections 
sometimes persist. As an example:

1. User logs in to a WinXP or Win2K3 machine using a domain account (the 
domain PDC is another Windows machine, not the Samba machine).

2. Once in Windows, a connection to the Samba machine is opened via the 
Run menu (\\server\share). The connections ('IPC$' and
'sharename' can
be seen via smbstatus and 'net use').

3. User logs out of the Windows machine without explicitly disconnecting 
from the Samba server.

4. Connections on the Samba server can sill be seen with smbstatus.

4. User logs in to the same Windows machine, this time with a local 
machine account (such as localMachine\Administrator).

5. User tries to connect to the Samba server using the Run menu, and 
gets an error saying that the password is invalid. Checking with 'net 
use' shows that a connection to the Samba server already exists.

6. Deleting the connection ('net use \\server\share /delete') sometimes 
restores functionality, but not consistently.

Any ideas? Thanks.

-Pete

-------------------------

[global]
         max log size = 50
         guest ok = yes
         username map = /etc/samba/smbusers
         server string = QA Lab Server
         load printers = yes
         socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
         workgroup = PULSAR
         local master = no
         wins support = yes
         printer name = HPLJ4P
         log file = /var/log/samba/%m.log
         printcap name = /etc/printcap
         dns proxy = no
         password server = None
[printers]
         comment = All Printers
         path = /var/spool/samba
         browseable = no
         printable = yes
         guest ok = yes
[data]
         comment = Antares Data
         path = /mnt/data
         writeable = yes
         hide dot files = yes
         force group = users
;       force create  = 0775
         force directory mode = 6775
         inherit permissions = yes