Hello,
gpk-update-viewer on my CentOS 6 desktop gives me an error about untrusted updates. When running yum update from a terminal I get the following error:
Package chkconfig-1.3.49.3-2.el6_4.1.x86_64.rpm is not signed
No other packages seem to be affected so for now I updated excuding chkconfig and ntsysv.
Regards, Leonard.