yum update: RH package not signed

[Jerry Kazdan]

When I use yum to update, there is an error message that one of the
packages is not signed (see below).  Since the package was assembled
by RedHat, I hope they will replace that package by one that is
signed.

Downloading Packages:
unsigned package arts-1.4.2-0.fc3.2.i386.rpm\\

Thanks,
Jerry

 [I know that I can stop yum from checking for signaturtes