=== modified file 'includes/menu.inc'
--- includes/menu.inc
+++ includes/menu.inc
@@ -412,7 +412,12 @@ function menu_execute_active_handler() {
   $arguments = isset($menu['callbacks'][$path]['callback arguments']) ? $menu['callbacks'][$path]['callback arguments'] : array();
   $arg = substr($_GET['q'], strlen($path) + 1);
   if (strlen($arg)) {
-    $arguments = array_merge($arguments, explode('/', $arg));
+    if ($menu['callbacks'][$path]['allow arguments'] === FALSE) {
+      return MENU_NOT_FOUND;
+    }
+    else {
+      $arguments = array_merge($arguments, explode('/', $arg));
+    }
   }

   return call_user_func_array($menu['callbacks'][$path]['callback'], $arguments);
@@ -1072,6 +1077,10 @@ function _menu_build() {
         $_menu['callbacks'][$item['path']]['callback arguments'] = $item['callback arguments'];
         unset($item['callback arguments']);
       }
+      if (isset($item['allow arguments'])) {
+        $_menu['callbacks'][$item['path']]['allow arguments'] = $item['allow arguments'];
+        unset($item['allow arguments']);
+      }
       unset($item['callback']);
     }
     $_menu['items'][$mid] = $item;
=== modified file 'modules/node/node.module'
--- modules/node/node.module
+++ modules/node/node.module
@@ -1021,6 +1021,7 @@ function node_menu($may_cache) {

     $items[] = array('path' => 'node', 'title' => t('content'),
       'callback' => 'node_page',
+      'allow arguments' => FALSE,
       'access' => user_access('access content'),
       'type' => MENU_MODIFIABLE_BY_ADMIN);
     $items[] = array('path' => 'node/add', 'title' => t('create content'),