Index: modules/simpletest/tests/menu_test.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/simpletest/tests/menu_test.module,v
retrieving revision 1.11
diff -u -r1.11 menu_test.module
--- modules/simpletest/tests/menu_test.module	14 Dec 2009 20:23:01 -0000	1.11
+++ modules/simpletest/tests/menu_test.module	5 Jan 2010 14:31:33 -0000
@@ -164,9 +164,40 @@
     'context' => MENU_CONTEXT_NONE,
   );
 
+  // Load arguments test.
+  $items['menu-test/arguments/%argument/%'] = array(
+    'title' => 'Arguments',
+    'page callback' => 'menu_test_arguments',
+    'page arguments' => array(2),
+    'load arguments' => array(3),  
+    'access arguments' => array('access content'),    
+  );
+  $items['menu-test/arguments/%argument/%/child'] = array(      
+    'title' => 'Arguments Child',
+    'type' => MENU_DEFAULT_LOCAL_TASK,    
+  );
+  
   return $items;
 }
 
+function argument_load($argument, $additional_value = NULL) {
+  return array(
+    $argument,
+    $additional_value,
+  );
+}
+
+
+/**
+ * Page callback for the load arguments inheritance test.
+ *
+ * @return
+ *  The input argument.
+ */
+function menu_test_arguments($arg) {
+  return print_r($arg, TRUE);  
+}
+
 /**
  * Dummy callback for hook_menu() to point to.
  *
Index: modules/simpletest/tests/menu.test
===================================================================
RCS file: /cvs/drupal/drupal/modules/simpletest/tests/menu.test,v
retrieving revision 1.26
diff -u -r1.26 menu.test
--- modules/simpletest/tests/menu.test	14 Dec 2009 20:23:01 -0000	1.26
+++ modules/simpletest/tests/menu.test	5 Jan 2010 14:31:33 -0000
@@ -354,6 +354,17 @@
     $this->assertRaw('title="Test title attribute"', t('Title attribute of a menu link renders.'));
     $this->assertRaw('testparam=testvalue', t('Query parameter added to menu link.'));
   }
+  
+  /**
+   * Test 'load arguments' inheritance.
+   */
+  function testMenuLoadArgumentsInheritance() {
+    $arg1 = $this->randomName(16);
+    $arg2 = $this->randomName(16);
+    $this->drupalGet("menu-test/arguments/$arg1/$arg2/child");
+    $this->assertText($arg1, t('First dynamic argument handled correctly.'));
+    $this->assertText($arg2, t('Second dynamic argument handled correctly.'));
+  }
 }
 
 /**
Index: includes/menu.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/menu.inc,v
retrieving revision 1.371
diff -u -r1.371 menu.inc
--- includes/menu.inc	4 Jan 2010 04:47:24 -0000	1.371
+++ includes/menu.inc	5 Jan 2010 14:31:32 -0000
@@ -3057,7 +3057,7 @@
       $fit = (1 << $number_parts) - 1;
     }
     $masks[$fit] = 1;
-    $item['load_functions'] = empty($load_functions) ? '' : serialize($load_functions);
+    $item['_load_functions'] = $load_functions;
     $item['to_arg_functions'] = empty($to_arg_functions) ? '' : serialize($to_arg_functions);
     $item += array(
       'title' => '',
@@ -3156,6 +3156,11 @@
             $item['theme arguments'] = $parent['theme arguments'];
           }
         }
+        if (isset($parent['load arguments']) && !isset($item['load arguments'])) {
+          foreach ($item['_load_functions'] as &$function) {
+            $function = array($function => $parent['load arguments']);
+          }
+        }
       }
     }
     if (!isset($item['access callback']) && isset($item['access arguments'])) {
@@ -3169,6 +3174,7 @@
       $item['access callback'] = intval($item['access callback']);
     }
 
+    $item['load_functions'] = empty($item['_load_functions']) ? '' : serialize($item['_load_functions']);
     $item += array(
       'access arguments' => array(),
       'access callback' => '',