If you rebuild the kdelibs rpm in 8.0, something in the process changes the
permissions of /usr/bin/kpac_dhcp_helper to be suid root (which it is not normally).
I know that one should be careful building rpms as root, but that I also think
that packages should build as cleanly as possible. Also, we don't exactly make
it easy for customers to build rpms as nonroot. The default setup leans heavily
towards building as root in /usr/src/redhat.
@(chown root $(bindir)/kpac_dhcp_helper && chmod 4755
$(bindir)/kpac_dhcp_helper) || echo "Please make kpac_dhcp_helper setuid root"
It's fixed in 3.1-0.1 or newer. It's still in 8.0.1-kde tree, which will be
moved to 8.0.1 soon.