[Samba] Samba over NFS: Total and Free disk incorrect in Windows.

[samba.list]

Hello,

I have a Linux machine auto-mounting an NFS share, then sharing it out
via Samba (not my idea).  Everything is fine - except: On Windows machines
that have mapped a drive to the Samba share the Total Size and Free Space 
for the mapped network drive (Samba/NFSshare) shows Total Size of 20.0 MB 
and Free Space of 0 bytes.

To rule out a very simple Samba problem I created a new (local)
directory on the Linux machine and shared it with Samba.  No problem.
Total and Free show correctly.

Thoughts?

Some details:

Linux is 2.4.21-15.ELsmp (RHEL3, recent load; fully updated)
Samba is: samba-common-3.0.9-1.3E.5

smb.conf (with some details XXXX'd out)
[global]

   workgroup = XXXX
   server string = Samba Server
        browseable = yes
   security = server
dns proxy = No
encrypt passwords = yes
   log file = /usr/local/samba/var/log.%m
   max log size = 50
   password server = XXXXX
   netbios name = XXXXX
   socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
   #logon drive = i:


#============================ Share Definitions ==============================
[home]
   comment = home Directories
   path = /home
   browseable = yes
   writable = yes