FYI, this information has been introduced firstly in the release notes of IA 2008, released mid-october 2007... Maybe they felt they had to introduce this precision as RHEL 3 was End of Production 2 phase: June 30, 2007 (see here: http://www.redhat.com/security/updates/errata/) and it will be EOL next year? Anyways, have you tried to install a setup created with IA 2009 on a RHEL 3 system and it didn't work?
