--- /usr/share/gdm/defaults.conf.orig	2008-12-16 21:11:40.000000000 +0100
+++ /usr/share/gdm/defaults.conf	2008-12-16 21:13:31.000000000 +0100
@@ -192,7 +192,7 @@
 # Xorg Xnest: /usr/X11/bin/Xnest -audit 0 -name Xnest
 # Xsun Xnest: /usr/openwin/bin/Xnest -audit 0 -name Xnest -pn
 # Xephyr:     /usr/X11/bin/Xephyr -audit 0
-Xnest=/usrbin/Xephyr -audit 0
+Xnest=/usr/bin/Xephyr -audit 0
 # Xsun Xnest does not support font paths (passed into Xnest -fp argument)
 # that include the ":unscaled" suffix after a path name.  Setting this to
 # false will strip any ":unscaled" suffix from the font path.  If not