What are the advantages of kt-update over cron-apt and unattended-upgrades?
kt-update allows (me) to remotely manage the various configuration our machines :
* simple http file servers provide different sources.list which contains some extra directives (seen as comment for apt-get or aptitude)
* one of this extra directives allow kt-update to replace and improve tasksel : when installing or purging packages with kt-update, kt-update checks it won't uninstall mandatory packages.
* kt-update checknfix is also use to be run at startup to auto-repair broken distribution (eg: power off during upgrade)
* kt-update is also used by people who are not familiar with Linux. They need to switch configuration depending on what they have to test, debug or develop (like "stable-withPackagesABandC", "testing-withMetaPackageP" or "experimental-..." )
Thanks for the links, so I am now reading man reportbug.