Just wanted to bring some wider attention to this issue:
I filed it a while back but the maintainer doesn't seem very responsive.
It seems krb5-auth-dialog has some kind of bug which causes it to notify
you that your credentials 'have expired' even if you don't have any.
krb5-auth-dialog isn't installed by default in F15 but it *was* in
previous releases, so anyone who upgrades from F13 or F14 to F15 is
going to see this; it results in a persistent notification in the Shell
which you can't really get rid of, short of removing the package
I imagine it shouldn't be too hard to fix, but the maintainer hasn't
responded at all yet.
Fedora QA Community Monkey
IRC: adamw | Fedora Talk: adamwill AT fedoraproject DOT org