# yum update [...] Installing: perl-Date-Manip noarch 5.48-3.el5 epel 166 k replacing perl-DateManip.noarch 5.44-1.2.1 perl-DateManip is a package included in CentOS and I'm pretty certain RHEL as well, so I suppose the obsoleting EPEL perl-Date-Manip package should be pulled ASAP.