I did find a spec related to this for Feisty, although it has been deferred, presumably because there are a lot of other specifications to implement for the next release.
https://blueprints.launchpad.net/distros/ubuntu/+spec/kubuntu-gdebi -- Cannot install deb packages from GUI in Kubuntu (no gdebi equivalent) https://launchpad.net/bugs/76158 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
