I am confused by the '/etc/apt/sources.list' that comes with Knoppix. It seemed natural to use 'stable' for sure, 'testing' to be a bit adventurous, and 'unstable' for the things you couldn't find in the other two. When I look at the file, I see entries for Mozilla, Xfree, Java, and the Blades Repository. Those entries seem like they water down the stability aspects of Debian by giving you stuff that does not pass even the minimal stability requirements of being graded 'unstable'. Which of those should I use

Thanks