The following ERRATA for SL 303 x86_64 are now available from:
ftp://ftp.scientificlinux.org/linux/scientific/303/x86_64/errata/SL/RPMS/

1. You will have to install these manually as the auto yum run does NOT do
   kernels.

2. Only for ia32e users.

   The yum version 2.0.7-8 that is now currently in contrib needs to be
   installed before installing these kernel updates.  This is because all
   yum version prior to this did not know of the arch ia32e.

ftp://ftp.scientificlinux.org/linux/scientific/303/x86_64/contrib/RPMS/systemutils/yum-2.0.7-8.SL.noarch.rpm

-----------------------------------------------------------------------------
  kernel-2.4.21-20.0.1.EL.ia32e.rpm
  kernel-2.4.21-20.0.1.EL.x86_64.rpm
  kernel-doc-2.4.21-20.0.1.EL.x86_64.rpm
  kernel-module-openafs-2.4.21-20.0.1.EL-1.2.11-15.10.SL.ia32e.rpm
  kernel-module-openafs-2.4.21-20.0.1.EL-1.2.11-15.9.SL.x86_64.rpm
  kernel-module-openafs-2.4.21-20.0.1.ELsmp-1.2.11-15.9.SL.x86_64.rpm
  kernel-smp-2.4.21-20.0.1.EL.x86_64.rpm
  kernel-smp-unsupported-2.4.21-20.0.1.EL.x86_64.rpm
  kernel-source-2.4.21-20.0.1.EL.x86_64.rpm
  kernel-unsupported-2.4.21-20.0.1.EL.ia32e.rpm
  kernel-unsupported-2.4.21-20.0.1.EL.x86_64.rpm

-Connie
-Troy
-Jarek