Service ticket KfM 4.5.1 on OSX 10.2.3

[jsiegle@psu.edu]

I want to request a kerberos 5 service ticket from my kdc. When I type
/usr/bin/kinit -S pop/email.psu.edu jsiegle and authenticate, I get a
service ticket. However when I open
/System/Library/CoreServices/Kerberos.app it tells me that the ticket I
have is not valid. This happens when my only ticket is the service
ticket. If I have both a tgt and the pop/email.psu.edu ticket, it works
fine. Should it be giving me an error when I only have the
pop/email.psu.edu ticket in my cache?

Thanks!