public key error on latest RPM updates

[R. Steven Rainwater]

I'm running Fedora 8 and use the package updater to maintain current
versions of my software including the Dell bios stuff. This has always
worked fine in the past but yesterday it indicated several of the Dell
bios utilities needed to be updated and then died with this error when I
allowed it to start the update:

"Unable to verify libsmbios2-2.2.2-1.1.fc8.i386"
"Public key for libsmbios2-2.2.2-1.1.fc8.i386.rpm is not installed"

As I've said, I've updated these many times before with no problem. This
suggests either the public key Dell is using has changed or these
packages were signed with the wrong key. I checked the wiki but couldn't
find anything about this or any links to the official key. 

Any advice?

-Steve