From: Marko Vojinovic vvmarko@gmail.com
The simple ordinary yum update of CentOS 5.3 spits a bunch of transaction check errors regarding packages perl-IO-Compress-Zlib-2.015-1.el5.rf.noarch and perl-IO-Compress-2.020-1.el5.rf.noarch which is supposed to replace perl-IO-Compress-Base-2.015-1.el5.rf.noarch:
They are apparently rebuilding many packages (and are still in the middle of the process...) Until it is sorted out, you could:
yum update --disablerepo=rpmforge
JD