RedHat updates and unknown GPG signature

[Nigel Wade]

Hi,

I'm trying to update a RHEL WS v4 system with the latest updates. But many of 
the packages are telling me that they are signed by an unknown key.

Has the GPG key changed? Any idea where I can get the necessary key to validate 
these packages, or could the downloads from RHN have got corrupted?

-- 
Nigel Wade, System Administrator, Space Plasma Physics Group,
             University of Leicester, Leicester, LE1 7RH, UK
E-mail :    nmw at ion.le.ac.uk
Phone :     +44 (0)116 2523548, Fax : +44 (0)116 2523555