Is there any requirement that Debian releases _must_ be labeled Stable, Frozen and Unstable?
IMO, those labels are misleading and/or unnecassrily pejorative. Certainly, today, Slink is the current Standard Debian version. Soon it will be displaced, as the Standard version, by Potato, which hopefully will soon emerge from its Pre-Release lockdown. Woody will stay in Development until it locks into Pre-Release. Just a thought, montefin