From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.1) Gecko/20020827 Description of problem: Updates to ypserv-2.5-2.7x rewrite /etc/sysconfig/yppasswdd without notice and without back up in a rpmsave file. Tried on redhat 7.2 with rpm -Fvh ypserv-2.5-2.7x.i386.rpm
Hmm. Its marked %config(noreplace) in the specfile, so it shouldn't do that. I think this may be an old rpm bug where it didn't follow %config directives.
Upgrade to rpm-4.0.4 packages from Red Hat 7.3.