hi, it seems there are a few source packages missing from 5.4: celt051-0.5.1.3-0.el5.src.rpm etherboot-5.4.4-10.el5.src.rpm iasl-20061109-5.el5.src.rpm kvm-83-105.el5.src.rpm log4cpp-1.0-4.el5.src.rpm qcairo-1.8.7.1-3.el5.src.rpm qffmpeg-0.4.9-0.15.20080908.el5.src.rpm qpixman-0.13.3-4.el5.src.rpm qspice-0.3.0-39.el5.src.rpm it seems all x86_64 only package's source are missing:-)
at the same time nautilus-sendto-1.0.1-6.el5.centos.src.rpm pango-1.14.9-6.el5.centos yum-metadata-parser-1.1.2-3.el5.centos.src.rpm has no reason to be .centos since there is no changes from rhel and i also suspect etherboot-5.4.4-10.el5.centos.X.rpm but as there is no src.rpm for etherboot i can't check it.