For RHEV releases it is desirable to have text-only errata shown in a release listing such as the: https://rhn.redhat.com/errata/rhel5-rhev-errata.html. Today they are not included in the listing because text-only errata technically are not associated with any RHN channel. Since major pieces of RHEV are not delivered as RPMs, we currently use text-only errata to announce updates to the software, so there will be much more of them in the future than there have been to date.
Sample text-only errata: https://rhn.redhat.com/errata/RHEA-2009-1545.html https://rhn.redhat.com/errata/RHEA-2009-1546.html
The BUGZILLA handler has been enhanced to accept an optional 'rhn_channel' key holding a list of channel labels to which the submitted erratum will be mapped, in addition to all the channels derived from the erratum packages, if any. The code changes pushed in ada815399f0b96138eeb778d443bfc6a039b936a.
On webdev.