I've been upgrading from v51 to v54. I've followed the procedure on 
http://www.scientificlinux.org/documentation/howto/upgrade.5x which 
simply states:

	• yum clean all
	• rpm -Uvh ftp://ftp.scientificlinux.org/linux/scientific/5x/i386/misc/RPMS/yum-conf-latest.SL.noarch.rpm
	• yum update yum
	• yum update

piece of cake.

The procedure works fine on my i386 machines, but on the x68_64 machines the yum update fails with 
hundreds of errors that look like...

...
  file /usr/share/man/man3/strict.3pm.gz from install of perl-5.8.8-27.el5.x86_64 conflicts with file from package perl-5.8.8-10.el5_2.3.i386
  file /usr/share/man/man3/utf8.3pm.gz from install of perl-5.8.8-27.el5.x86_64 conflicts with file from package perl-5.8.8-10.el5_2.3.i386
...

It looks like the upgrade is trying to move me from x86_64 to i386. is there a different yum-conf that I should 
be using? Help appreciated.

-Andy