Over 40% of the 6.0 RPM's, especially SRPM's, are not RHEL 5 compatible

After some recent discussion about which RPM versions were used to
build the 6.0 software, and some very helpful explanation of the use
of the '%{rpmversion}' option for detecting which are compatible with
older releases, I've noticed that approximately 40% of the SRPM's in
the Jpackage 6.0 release are not installable under RHEL 5.

I realize it's a pain in the neck, and potentially begging for version
skew. But how bad would it be to set up at least an SRPM directory
with those SRPM's rebuilt, perhaps with a slightly updated "Release:"
field to avoid confusion about the checksums of the SRPM packages. I
admit that I, personally, like using this syntax.

    Release: 1%{?dist}

That way, I can set "dist" locally in .rpmmacros or as an rpmbuild
option to set an OS or configuration environment specific settting. It
might be useful here and in general.