- Don't report duplicate entries - it is an OK thing to do.

includes/menu.inc

@@ -4,10 +4,7 @@
 function menu($path, $title, $callback = NULL, $help = NULL, $weight = 0, $hidden = 0) {
   global $_gmenu;
 
-  if (isset($_gmenu[$path])) {
-    trigger_error("trying to add '$path' which already exists");
-  }
-  else {
+  if (empty($_gmenu[$path])) {
     // add the menu to the flat list of menu items:
     $_gmenu[$path] = array("title" => $title, "callback" => $callback, "help" => $help, "weight" => $weight, "hidden" => $hidden, "children" => array());