Not sure if this is a hint or a warning, but if you use the old Kerberos utility in Leopard and prior to get/set tickets manually, you're seemingly out of luck in Snow Leopard. Apple just removed the utility completely -- even on an upgrade, it's just deleted.
If you have 10.5 still available, though, the Leopard Kerberos utility works just fine on Snow Leopard. I really don't know why Apple leaves ancient Bluetooth firmware updaters cluttering my Utilities folder until the end of time, but removes a perfectly usable app, even if it has a small audience.
[robg adds: According to an associate at Macworld, the Kerberos utility has been renamed Ticket Viewer, and can be found in /System » Library » CoreServices. I haven't used either app, so I'm not sure if they're identical or not.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20090826171748770