There's an inconsistency in the verification of packages in the errata test
of gnorpm.  If running as a normal user, you click the verify button on the
menu bar or the Verify option in the Packages menu, you get an error
message about requiring superuser privileges to verify packages.  In
contrast, if you select a package from one of the package groups and right
click on the package and select verify from the context menu, you are
happily allowed to verify the package.

So either verify_one() in verify.c needs an euid check added or the check
in rpm_verify_pkgs() in mainwin.c needs to be removed.  As RPM by default
allows any user to verify already installed packages, I'd lean towards the
latter.