diff -up openbox-3.4.11.2/data/xsession/openbox-gnome-session.in.gnome openbox-3.4.11.2/data/xsession/openbox-gnome-session.in
--- openbox-3.4.11.2/data/xsession/openbox-gnome-session.in.gnome	2010-03-14 15:40:37.000000000 +0100
+++ openbox-3.4.11.2/data/xsession/openbox-gnome-session.in	2011-01-14 17:15:18.738710496 +0100
@@ -24,7 +24,7 @@ if test $MAJOR -lt 2 || (test $MAJOR = 2
   # old gnome-session was easy to work with
   export WINDOW_MANAGER="@bindir@/openbox"
   exec gnome-session --choose-session=openbox-session "$@"
-else
+elif test $MAJOR = 2 && test $MINOR -lt 91; then
   # new gnome-session requires openbox to be set in gconf and an
   # openbox.desktop to be installed in the applications directory
 
@@ -54,6 +54,8 @@ else
 
   # run GNOME/Openbox
   exec gnome-session --default-session-key $SPATH/openbox_session "$@"
+else
+  exec gnome-session --session=gnome-openbox "$@"
 fi