I'm using Coda 6.0.11 and MIT Kerberos 1.3.6.
I'm using Ubuntu Hoary.

I build Coda with the rules file that came with the default sources,
with the added options:
--with-crypto --with-openssl --with-krb5

When I clog, the client gives me:
$ clog uname_at_realmname
username: uname_at_realmname
Invalid login (RPC2_NOTAUTHENTICATED (F)).

Klist shows:
$ klist
Ticket cache: FILE:/tmp/krb5cc_1000
Default principal: uname_at_FOO.BAR.COM

Valid starting     Expires            Service principal
08/08/05 13:30:14  08/08/05 23:27:10  krbtgt/FOO.BAR.COM_at_FOO.BAR.COM
08/08/05 13:30:24  08/08/05 23:27:10 
host/CODASERVER.FOO.BAR.COM_at_FOO.BAR.COM


Kerberos 4 ticket cache: /tmp/tkt1000
klist: You have no tickets cached

The server gives: (in AuthLog)
Krb5Validate: Wrong principal in request while reading request
14:08:14 Authentication failed for
"n???0?????????????????????????4a??00??,?????
????FOO.BAR" from [::ffff:192.168.45.114]:32785

where my realm name is FOO.BAR.COM

As a note, I needed to modify krb5.c to get it to build against that
version of Kerberos.

Any help is appreciated.