Bug#634874: Please add error for udebs that contain non gziped tarballs
udpkg (the dpkg equivalent within d-i) does only support gziped tarballs. So it does not support data.tar.bz2 and similar.
It would be good if there could be an autoreject for these to avoid broken daily/weekly images and uninstallable udebs.
Info: This udeb contains non-gzip control or data tarballs.
udpkg, debian-installer's dpkg equivalent, does not support non-gzip tarballs which means udebs that contain them won't be installable. This can also break the daily or weekly d-i images.