I'm glad to see sawfish is in Debian again! About this annoying message, here's a workaround for the sawfish user:
1. cd ~/.sawfish/lisp (create directory first, if necessary) 2. ln -s /usr/share/sawfish/lisp/sawfish/wm/integration/gnome.jlc The mantainer should create a similar symlink from /usr/share/sawfish/lisp to solve this bug. --