If you want to live on the bleeding edge, it’s easy enough to get a non existing release of GNU Emacs under debian sid, thanks to http://emacs.orebokech.com/.
The problem is that Emacs Muse is broken on emacs-snapshot, partly because of Htmlize which is unable to find the face fonts (I got (error "Invalid face")), partly because of my configuration itself:
hunk ./dim-muse.el 22 - '(("pgsql.tapoueh.org" $ - (,@(muse-project-alist-dirs "~/dev/muse/site") $ + '(("pgsql.