samba - Mar 2005 - Oplocks for veto'd files (Samba 2.2.8a on SuSE 9.0)

In my smb.conf file, I've got the following section:

[homes]
        comment = Home Directories
        valid users = %S
        guest ok = no
        read only = No
        create mask = 0640
        directory mask = 0750
        browseable = No
        veto oplock files = /*.mdb/*.MDB/*.pst/*.PST/


And yet, in the syslog, I'm still getting these...

Mar 10 10:22:34 riffraff smbd[25404]: [2005/03/10 10:22:34, 0]
smbd/oplock.c:oplock_break(797)
Mar 10 10:22:34 riffraff smbd[25404]:   oplock_break: receive_smb timed out
after 30 seconds.
Mar 10 10:22:34 riffraff smbd[25404]:   oplock_break failed for file
mail/outlook.pst (dev = 3a02, inode = 112407, file_id = 3).
Mar 10 10:22:34 riffraff smbd[25404]: [2005/03/10 10:22:34, 0]
smbd/oplock.c:oplock_break(869)
Mar 10 10:22:34 riffraff smbd[25404]:   oplock_break: client failure in
oplock break in file mail/outlook.pst

Any idea why the oplocks are still being performed?

(Pardon the two messages; I think these are two separate issues, and so want
to track them separately.)