diff -up gtk+-2.13.7/gdk/x11/gdkscreen-x11.c.screen-size-change gtk+-2.13.7/gdk/x11/gdkscreen-x11.c
--- gtk+-2.13.7/gdk/x11/gdkscreen-x11.c.screen-size-change	2008-08-26 22:19:26.000000000 -0400
+++ gtk+-2.13.7/gdk/x11/gdkscreen-x11.c	2008-08-26 22:19:42.000000000 -0400
@@ -985,7 +985,7 @@ _gdk_x11_screen_size_changed (GdkScreen 
     return;
 #endif
   
-  init_multihead (screen);
+  _gdk_x11_screen_process_monitors_change (screen);
   g_signal_emit_by_name (screen, "size_changed");
 }