Replacing Metacity with XFCE's xfwm4

I found the following Ubuntu-specific pages with information about replacing Metacity with XFCE's xfwm4:

Note that the Ubuntu instructions don't quite work for Debian because of Debian's customized /usr/bin/gnome-wm. On Fedora Core 6, GNOME doesn't seem to acknowledge the $WINDOW_MANAGER env var, so it's necessary to use gconf: gconftool-2 --type string --set /apps/gnome-session/rh/window_manager /usr/bin/xfwm4

Update 2007-06-05: It looks like those pages don't say how to turn on the Composite extension in X.org. To do so, add the following to xorg.conf:

Section "Extensions" Option "Composite" "Enable" EndSection


Why xfwm4 rules:

Downsides to using xfwm4 under GNOME: