samba - Sep 2005 - CUPS username case wrong from Windows 98 client

I have a problem getting Windows 98 clients printing to CUPS printers
where I have the printer access allowed/denied by username. It appears
that samba is passing the username in uppercase to CUPS as the owner of
the printjob and then CUPS does not recognise that username and rejects
the job. It all works under Windows NT/XP.

I am running samba 3.0.20 and cups 1.1.23. The smb.conf file is below

# Samba config file created using SWAT
# from 131.227.115.22 (131.227.115.22)
# Date: 2005/05/12 12:36:36
 
# Global parameters
[global]
        display charset = ASCII
        workgroup = SEPS
        netbios name = PHSMB
        netbios aliases = moria
        update encrypted = Yes
        smb passwd file = /etc/samba/smbpasswd
        private dir = /etc/samba
        passdb backend = ldapsam:ldap://eldar
        username map = /etc/samba/smbusers
        log level = 0
        log file = /var/log/samba/log.%m
        max log size = 1000
        name resolve order = wins lmhosts bcast host
        time server = Yes
        lpq cache time = 60
        max open files = 1000
        socket options = TCP_NODELAY SO_SNDBUF=8192 SO_RCVBUF=8192
        logon script = logon.cmd
        logon path = \\phsmb\homes\.winprofile
        logon drive = H:
        logon home = \\phsmb\homes
        domain logons = Yes
        domain master = No
        wins server = 131.227.76.25
        ldap admin dn = cn=Manager,dc=eps,dc=surrey,dc=ac,dc=uk
        ldap delete dn = Yes
        ldap group suffix = ou=Groups
        ldap idmap suffix = dc=eps,dc=surrey,dc=ac,dc=uk
        ldap machine suffix = ou=Computers
        ldap suffix = dc=eps,dc=surrey,dc=ac,dc=uk
        ldap ssl = no
        ldap user suffix = ou=People
        lock directory = /var/cache/samba
        pid directory = /var/run
        utmp directory = /var/run
        wtmp directory = /var/log
        utmp = Yes
        template shell = /usr/local/bin/tcsh
        printing = cups
        printer admin = phs1dm, phs2jd, @scs
        hosts allow = 131.227.
 
[netlogon]
        path = /usr/local/samba/netlogon
        write list = root, phs1dm
 
[homes]
        comment = Home Directories
        read only = No
        create mask = 0740
        directory mask = 0751
        browseable = No
 
[printers]
        comment = All Printers
        path = /tmp
        create mask = 0700
        printable = Yes
        browseable = No
 
And here is the relevant printers.conf entry from cups

<DefaultPrinter wells>
Info Physics Computer support printer
Location 1BC04
DeviceURI cupspykota:socket://wells:9100
State Idle
Accepting Yes
JobSheets none none
QuotaPeriod 0
PageLimit 0
KLimit 0
AllowUser phs1dm
</Printer>

This is the relevant entries from the cups error log

D [09/Sep/2005:10:40:13 +0000] [Job 1] printer-uri
"ipp://marvin.ph.surrey.ac.uk:631/printers/wells"
D [09/Sep/2005:10:40:13 +0000] [Job 1] requesting-user-name = "PHS1DM"
D [09/Sep/2005:10:40:13 +0000] [Job 1] job-name = "smbprn.00000001
Printer Test Page"
E [09/Sep/2005:10:40:13 +0000] [Job 1] Print file was not accepted
(client-error-not-possible)!
E [09/Sep/2005:10:40:13 +0000] PID 27866 stopped with status 1!

Here samba is converting the username as passed from Win 98 in upper
case to lower case for authentication but it still passes the upper case
username to CUPS. I've turned the debug level up to 20 but I still can't
find any log message showing where that is. 

[2005/09/09 10:39:52, 2] auth/auth.c:(307)
  check_ntlm_password:  authentication for user [PHS1DM] -> [PHS1DM] ->
[phs1dm] succeeded

-- 
--------------------------------------------------------------------
David Munro                         email: d.munro@surrey.ac.uk
Department of Physics               phone: 01483 689415 (direct line)
University of Surrey                fax:   01483 686781
Guildford, Surrey, UK, GU2 7XH