I use Centos on my server, installed few months ago with rpmforge repository enabled to get amavisd-new and spamassassing working. I have yum-priorities installed and configured. I have "exclude=spamassass*" in Centos repo files.
Everithing ok 'till yesterday: I try "yum update" command and get this error:

[missing]
Missing Dependency: perl(Compress::Raw::Zlib) = 2.024 is needed by package perl-IO-Compress-2.024-1.el5.rf.noarch (rpmforge)
[missing]

I try "yum downgrade Perl-Compress-Raw-Bzip2" to get library removed (I'll reinstall it manually). Yum command (as predictable) removes amavisd-new and spamassassin too.
BUT ... now if I try to reinstall spamassassin yum DOESN'T find spamassassin package ...
I tried with a twin server (i386 architecture), but everithing is OK. It seems like there's some problem with x64 repository ...
Some suggestion?

Well,.. the first thing I would try is a

rpmforge will be in disarray for the next few weeks. there was something on the mailing list about their priorities' being preparing for rhel 6.