f16 beta: kerberos credentials expired

[Ian Malone]

Hi,

F16 beta, whenever I log in, tells me "Network credentials have
expired" or, as the message puts it, "Your Kerberos credentails have
expired." (sic). I didn't know I had any up to this point. Choosing
list tickets in the notification shows I don't have any tickets,
choosing get ticket brings up an error message saying "Kerberos
Authentication Error" and "Couldn't acquire kerberos ticket: Cannot
resolve network address for KDC in realm "EXAMPLE.COM"'."

Does anyone know why this might happen?

Thanks
-- 
imalone