[CentOS] getting update details

I see in CentOS 3.6 - the release notes state that it has
"improved support for dual-core processors"  I got that from
http://www.redhat.com/docs/manuals/enterprise/RHEL-3-Manual/release-notes/as-x86/RELEASE-NOTES-U6-x86-en.html

Where might I get more details about this improved support.  Specifically I'd like
to see if problems I'm having in 3.5 could be related to the kernel and dual core cpus.

-Mark
-- 
Mark Belanger
LTX Corporation