I have installed Ubuntu 6.10 beta today. After installing emacs21 and emacs-snapshot-gtk, I saw that the font faces are totally messed up. After some search on the Internet, I have found that they have changed the font path in edgy from /usr/share/X11/fonts to /usr/share/fonts/X11. By editing the /etc/X11/xorg.conf file, replacing all occurrences of /usr/share/X11/fonts with /usr/share/fonts/X11 and restarting the X server solved the problem for me. The details about this bug can be found on launchpad.