I installed the Debian beta3 version and I've discovered that it doesn't work as smoothly with my chroot scripts. In particular, the mpd (music player daemon) is installed, and it adds the mpd user. The users from the original install are overwritten by the default OS2008 users when you copy the /etc/passwd file in the chroot script, and then apt-get complains a lot that the mpd user is missing. I guess you need to purge mpd before copying over the passwd file.