diff --git a/core/includes/menu.inc b/core/includes/menu.inc
index 0ab3d8c99a0..98b544d8bd3 100644
--- a/core/includes/menu.inc
+++ b/core/includes/menu.inc
@@ -3475,7 +3475,6 @@ function _menu_router_build($callbacks) {
   $menu = array();
   $masks = array();
   foreach ($callbacks as $path => $item) {
-    $load_functions = array();
     $to_arg_functions = array();
     $fit = 0;
     $move = FALSE;
@@ -3493,20 +3492,10 @@ function _menu_router_build($callbacks) {
       if (preg_match('/^%(|' . DRUPAL_PHP_FUNCTION_PATTERN . ')$/', $part, $matches)) {
         if (empty($matches[1])) {
           $match = TRUE;
-          $load_functions[$k] = NULL;
         }
         else {
           if (function_exists($matches[1] . '_to_arg')) {
             $to_arg_functions[$k] = $matches[1] . '_to_arg';
-            $load_functions[$k] = NULL;
-            $match = TRUE;
-          }
-          if (function_exists($matches[1] . '_load')) {
-            $function = $matches[1] . '_load';
-            // Create an array of arguments that will be passed to the _load
-            // function when this menu path is checked, if 'load arguments'
-            // exists.
-            $load_functions[$k] = isset($item['load arguments']) ? array($function => $item['load arguments']) : $function;
             $match = TRUE;
           }
         }
@@ -3526,7 +3515,6 @@ function _menu_router_build($callbacks) {
       $fit = (1 << $number_parts) - 1;
     }
     $masks[$fit] = 1;
-    $item['_load_functions'] = $load_functions;
     $item['to_arg_functions'] = empty($to_arg_functions) ? '' : serialize($to_arg_functions);
     $item += array(
       'title' => '',
@@ -3632,14 +3620,14 @@ function _menu_router_build($callbacks) {
         // Same for load arguments: if a loader doesn't have any explict
         // arguments, try to find arguments in the parent.
         if (!isset($item['load arguments'])) {
-          foreach ($item['_load_functions'] as $k => $function) {
+          foreach ($item['load functions'] as $k => $function) {
             // This loader doesn't have any explict arguments...
             if (!is_array($function)) {
               // ... check the parent for a loader at the same position
               // using the same function name and defining arguments...
-              if (isset($parent['_load_functions'][$k]) && is_array($parent['_load_functions'][$k]) && key($parent['_load_functions'][$k]) === $function) {
+              if (isset($parent['load functions'][$k]) && is_array($parent['load functions'][$k]) && key($parent['load functions'][$k]) === $function) {
                 // ... and inherit the arguments on the child.
-                $item['_load_functions'][$k] = $parent['_load_functions'][$k];
+                $item['load functions'][$k] = $parent['load functions'][$k];
               }
             }
           }
@@ -3657,7 +3645,7 @@ function _menu_router_build($callbacks) {
       $item['access callback'] = intval($item['access callback']);
     }
 
-    $item['load_functions'] = empty($item['_load_functions']) ? '' : serialize($item['_load_functions']);
+    $item['load_functions'] = empty($item['load functions']) ? '' : serialize($item['load functions']);
     $item += array(
       'access arguments' => array(),
       'access callback' => '',
diff --git a/core/lib/Drupal/Core/UrlMatcher.php b/core/lib/Drupal/Core/UrlMatcher.php
index 4b1cde778b8..2d86020d35d 100644
--- a/core/lib/Drupal/Core/UrlMatcher.php
+++ b/core/lib/Drupal/Core/UrlMatcher.php
@@ -50,6 +50,7 @@ class UrlMatcher extends SymfonyUrlMatcher {
       $routes->add(hash('sha256', $router_item['path']), $this->convertDrupalItem($router_item));
 
       if ($ret = $this->matchCollection($pathinfo, $routes)) {
+        //drupal_set_message('<pre>' . var_export('test', TRUE) . '</pre>');
         // Stash the router item in the attributes while we're transitioning.
         $ret['drupal_menu_item'] = $router_item;
 
@@ -82,7 +83,17 @@ class UrlMatcher extends SymfonyUrlMatcher {
     // become more complicated because we'll need to get back candidates for a
     // path and them resolve them based on things like method and scheme which
     // we currently can't do.
-    return menu_get_item($path);
+    $item = menu_get_item($path);
+    $path_elements = explode('/', $item['path']);
+    $i = 0;
+    foreach ($path_elements as $key => $element) {
+      if ($element == '%') {
+        $path_elements[$key] = "{arg$i}";
+        $i++;
+      }
+    }
+    $item['path'] = implode('/', $path_elements);
+    return $item;
   }
 
   protected function convertDrupalItem($router_item) {
diff --git a/core/modules/node/node.module b/core/modules/node/node.module
index 93f0ddcaafe..0a272023d18 100644
--- a/core/modules/node/node.module
+++ b/core/modules/node/node.module
@@ -2072,32 +2072,41 @@ function node_menu() {
       'title' => $type->name,
       'title callback' => 'check_plain',
       'page callback' => 'node_add',
-      'page arguments' => array($type->type),
+      'page arguments' => array('type' => $type->type),
       'access callback' => 'node_access',
       'access arguments' => array('create', $type->type),
       'description' => $type->description,
       'file' => 'node.pages.inc',
     );
   }
-  $items['node/%node'] = array(
+  $items['node/%'] = array(
+    'load functions' => array(
+      1 => 'node_load',
+    ),
     'title callback' => 'node_page_title',
     'title arguments' => array(1),
     // The page callback also invokes drupal_set_title() in case
     // the menu router's title is overridden by a menu link.
     'page callback' => 'node_page_view',
-    'page arguments' => array(1),
+    'page arguments' => array('node' => 1),
     'access callback' => 'node_access',
     'access arguments' => array('view', 1),
   );
-  $items['node/%node/view'] = array(
+  $items['node/%/view'] = array(
+    'load functions' => array(
+      1 => 'node_load',
+    ),
     'title' => 'View',
     'type' => MENU_DEFAULT_LOCAL_TASK,
     'weight' => -10,
   );
-  $items['node/%node/edit'] = array(
+  $items['node/%/edit'] = array(
+    'load functions' => array(
+      1 => 'node_load',
+    ),
     'title' => 'Edit',
     'page callback' => 'node_page_edit',
-    'page arguments' => array(1),
+    'page arguments' => array('node' => 1),
     'access callback' => 'node_access',
     'access arguments' => array('update', 1),
     'weight' => 0,
@@ -2105,10 +2114,13 @@ function node_menu() {
     'context' => MENU_CONTEXT_PAGE | MENU_CONTEXT_INLINE,
     'file' => 'node.pages.inc',
   );
-  $items['node/%node/delete'] = array(
+  $items['node/%/delete'] = array(
+    'load functions' => array(
+      1 => 'node_load',
+    ),
     'title' => 'Delete',
     'page callback' => 'drupal_get_form',
-    'page arguments' => array('node_delete_confirm', 1),
+    'page arguments' => array('form_id' => 'node_delete_confirm', 1),
     'access callback' => 'node_access',
     'access arguments' => array('delete', 1),
     'weight' => 1,
diff --git a/core/modules/system/system.module b/core/modules/system/system.module
index 332e5590044..7c56f26b354 100644
--- a/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -796,7 +796,7 @@ function system_menu() {
     'title' => 'Performance',
     'description' => 'Enable or disable page caching for anonymous users and set CSS and JS bandwidth optimization options.',
     'page callback' => 'drupal_get_form',
-    'page arguments' => array('system_performance_settings'),
+    'page arguments' => array('form_id' => 'system_performance_settings'),
     'access arguments' => array('administer site configuration'),
     'file' => 'system.admin.inc',
     'weight' => -20,