GPG errors on up2date

[Jeff Davis]

Been getting these errors with several of the recent Fedora updates:

bash-2.05b-34.i386.rpm:     The package bash-2.05b-34 does not have a
valid GPG signature.
It has been tampered with or corrupted.  Aborting...

************ GPG VERIFICATION ERROR ****************
The package bash-2.05b-34 failed its gpg signature verification. This
means the package is corrupt.
****************************************************

I'm using 'up2date -u' from shell to run up2date whenever I see an email
announcement about an update. Had three different packages fail this way
in the last two weeks.

What gives?
 
-- 
Jeff