After yum upgrading from F-10 to rawhide/F11-beta and querying the remaining f10 packages I see libdhcp and it mentions in the dead.package [1] that it should be obsoleted by NetworkManager or dhclient with the former being the likely candidate but NM doesn't provide that. Either package needs to obsolete libdhcp to cleanup the old package. [1] http://cvs.fedoraproject.org/viewvc/rpms/libdhcp/devel/dead.package?view=markup
*** This bug has been marked as a duplicate of bug 493547 ***