Password incorrect while getting initial credentials using keytab on Solaris with AD

[PS]

Hi,

I am stumped as to what is wrong with my Kerberos authentication.
What I am trying to do is get Kerberos working so I can then use
mod_auth_kerb with Apache to authenticate our domain users.

I have compiled and installed MIT Kerberos 1.5.4, on Solaris 9, and
configured my /etc/krb5.conf as follows:
[libdefaults]
    default_realm = CORP.FC.LOCAL
    default_tkt_enctypes = des-cbc-md5 des-cbc-crc
    default_tgs_enctypes = des-cbc-md5 des-cbc-crc

[domain_realm]
    .fc.fujitsu.com = CORP.FC.LOCAL

[realms]
     CORP.FC.LOCAL = {
                      admin_server   = dc.corp.fc.local:464
                      kdc            = dc.corp.fc.local:88
                      kpasswd_server = dc.corp.fc.local:464
                     }

[logging]
    kdc = FILE:/var/log/kerberos/krb5kdc.log
    admin_server = FILE:/var/log/kerberos/kadmin.log
    default = FILE:/var/log/kerberos/krb5lib.log

I tested with the kinit command and I am able to get a Kerberos ticket
with my own domain ID and password:
root at fc650dr:/usr/www/kerberos/bin # kinit seelypet
Password for seelypet at CORP.FC.LOCAL:
root at fc650dr:/usr/www/kerberos/bin # klist -e
Ticket cache: FILE:/tmp/krb5cc_0
Default principal: seelypet at CORP.FC.LOCAL

Valid starting     Expires            Service principal
03/25/08 11:12:26  03/25/08 21:12:31  krbtgt/
CORP.FC.LOCAL at CORP.FC.LOCAL
        renew until 03/26/08 11:12:26, Etype (skey, tkt): DES cbc mode
with RSA-MD5, ArcFour with HMAC/md5

We have created a user to be used for the Apache Kerberos
authentication in Active Directory (Windows 2003 SP1) with the
following properties:
- User cannot change password
- Password never expires
- Use DES encryption types with this account
- Does not require Kerberos preauthentication

I am able to get a Kerberos ticket with this account when I supply the
password:

root at fc650dr:/usr/www/kerberos/bin # kinit Apache-DBA.Account
Password for Apache-DBA.Account at CORP.FC.LOCAL:
root at fc650dr:/usr/www/kerberos/bin # klist -e
Ticket cache: FILE:/tmp/krb5cc_0
Default principal: Apache-DBA.Account at CORP.FC.LOCAL

Valid starting     Expires            Service principal
03/25/08 11:14:31  03/25/08 21:14:31  krbtgt/
CORP.FC.LOCAL at CORP.FC.LOCAL
        renew until 03/26/08 11:14:31, Etype (skey, tkt): DES cbc mode
with RSA-MD5, ArcFour with HMAC/md5

We generated a keytab file on the Active Directory DC for this
account, to map to service principal HTTP/fc650dr.fc.fujitsu.com,
with the following command
ktpass -princ HTTP/fc650dr.fc.fujitsu.com at CORP.FC.LOCAL -mapuser CORP
\Apache-DBA.Account -crypto DES-CBC-MD5 -ptype KRB5_NT_SRV_HST -pass
passw0rd -out c:\ktpass\fc650drkeytabv4

I verified that, in Active Directory, the "User login name" shows HTTP/
fc650dr.fc.fujitsu.com, indicating that the mapping was made.

The keytab file was transferred to the Solaris server.  When I try to
use the keytab file, this is the result:
root at fc650dr:/usr/www/kerberos/bin # kinit -kt fc650drkeytabv4 HTTP/
fc650dr.fc.fujitsu.com
kinit(v5): Password incorrect while getting initial credentials

However I am able to get a Kerberos ticket using the SPN shown, when I
supply the password:
root at fc650dr:/usr/www/kerberos/bin # kinit HTTP/fc650dr.fc.fujitsu.com
Password for HTTP/fc650dr.fc.fujitsu.com at CORP.FC.LOCAL:
root at fc650dr:/usr/www/kerberos/bin # klist -e
Ticket cache: FILE:/tmp/krb5cc_0
Default principal: HTTP/fc650dr.fc.fujitsu.com at CORP.FC.LOCAL

Valid starting     Expires            Service principal
03/25/08 11:21:30  03/25/08 21:21:30  krbtgt/
CORP.FC.LOCAL at CORP.FC.LOCAL
        renew until 03/26/08 11:21:30, Etype (skey, tkt): DES cbc mode
with RSA-MD5, ArcFour with HMAC/md5

The kvno in the keytab looks like it matches the ticket being given by
AD:
root at fc650dr:/usr/www/kerberos/bin # klist -kt fc650drkeytabv4
Keytab name: FILE:fc650drkeytabv4
KVNO Timestamp         Principal
---- -----------------
--------------------------------------------------------
   2 12/31/69 20:00:00 HTTP/fc650dr.fc.fujitsu.com at CORP.FC.LOCAL

root at fc650dr:/usr/www/kerberos/bin # kvno HTTP/fc650dr.fc.fujitsu.com
HTTP/fc650dr.fc.fujitsu.com at CORP.FC.LOCAL: kvno = 2

I tried creating a keytab on the Solaris machine using ktutil with
this command:
addent -password -p HTTP/fc650dr.fc.fujitsu.com at CORP.FC.LOCAL -k 2 -e
des-cbc-md5

but the result is the same as above when testing with this keytab
also.

Any idea what can be wrong here?  Any ideas much appreciated.

Thanks.