I ran update and dist-upgrade. The live-helper set up complained about duplicate files in /usr/share/live-helper/includes.debian directory. Checking I found the directory contained soft links from etch to sid and lenny to sid both dated 2008-06-16 and a soft link from squeeze to lenny dated 2008-12-29 (today). I haven't used live-helper since last June but am planning to do so again. Perhaps I delete all of this and reinstall? Tom