Index: includes/menu.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/menu.inc,v
retrieving revision 1.362
diff -u -p -r1.362 menu.inc
--- includes/menu.inc	11 Nov 2009 08:28:50 -0000	1.362
+++ includes/menu.inc	14 Nov 2009 14:27:02 -0000
@@ -162,7 +162,7 @@ define('MENU_SUGGESTED_ITEM', MENU_VISIB
  * parent item. An example is the path "node/52/edit", which performs the
  * "edit" task on "node/52".
  */
-define('MENU_LOCAL_TASK', MENU_IS_LOCAL_TASK);
+define('MENU_LOCAL_TASK', MENU_IS_LOCAL_TASK | MENU_VISIBLE_IN_BREADCRUMB);
 
 /**
  * Menu type -- The "default" local task, which is initially active.
@@ -170,7 +170,7 @@ define('MENU_LOCAL_TASK', MENU_IS_LOCAL_
  * Every set of local tasks should provide one "default" task, that links to the
  * same path as its parent when clicked.
  */
-define('MENU_DEFAULT_LOCAL_TASK', MENU_IS_LOCAL_TASK | MENU_LINKS_TO_PARENT);
+define('MENU_DEFAULT_LOCAL_TASK', MENU_IS_LOCAL_TASK | MENU_LINKS_TO_PARENT | MENU_VISIBLE_IN_BREADCRUMB);
 
 /**
  * Menu type -- An action specific to the parent, usually rendered as a link.
@@ -178,7 +178,7 @@ define('MENU_DEFAULT_LOCAL_TASK', MENU_I
  * Local actions are menu items that describe actions on the parent item such
  * as adding a new user, taxonomy term, etc.
  */
-define('MENU_LOCAL_ACTION', MENU_IS_LOCAL_TASK | MENU_IS_LOCAL_ACTION);
+define('MENU_LOCAL_ACTION', MENU_IS_LOCAL_TASK | MENU_IS_LOCAL_ACTION | MENU_VISIBLE_IN_BREADCRUMB);
 
 /**
  * @} End of "Menu item types".
@@ -2287,12 +2287,14 @@ function menu_get_router() {
  * Builds a link from a router item.
  */
 function _menu_link_build($item) {
-  if ($item['type'] == MENU_CALLBACK) {
-    $item['hidden'] = -1;
-  }
-  elseif ($item['type'] == MENU_SUGGESTED_ITEM) {
+  // Suggested items are hidden in terms of disabled by default.
+  if ($item['type'] == MENU_SUGGESTED_ITEM) {
     $item['hidden'] = 1;
   }
+  // Hide any other items that are not visible in the tree (MENU_NORMAL_ITEM).
+  elseif (!($item['type'] & MENU_VISIBLE_IN_TREE)) {
+    $item['hidden'] = -1;
+  }
   // Note, we set this as 'system', so that we can be sure to distinguish all
   // the menu links generated automatically from entries in {menu_router}.
   $item['module'] = 'system';
@@ -2343,8 +2345,9 @@ function _menu_navigation_links_rebuild(
           $item['plid'] = $existing_item['plid'];
         }
         else {
-          // If it moved, put it at the top level in the new menu.
-          $item['plid'] = 0;
+          // It moved to a new menu, so let menu_link_save() try to find a
+          // valid parent based on path.
+          unset($item['plid']);
         }
         $item['has_children'] = $existing_item['has_children'];
         $item['updated'] = $existing_item['updated'];
@@ -2543,7 +2546,6 @@ function _menu_delete_item($item, $force
  *   saved.
  */
 function menu_link_save(&$item) {
-
   drupal_alter('menu_link', $item);
 
   // This is the easiest way to handle the unique internal path '<front>',
@@ -2569,14 +2571,11 @@ function menu_link_save(&$item) {
     }
   }
 
-  if (isset($item['plid'])) {
-    if ($item['plid']) {
-      $parent = db_query("SELECT * FROM {menu_links} WHERE mlid = :mlid", array(':mlid' => $item['plid']))->fetchAssoc();
-    }
-    else {
-      // Don't bother with the query - mlid can never equal zero..
-      $parent = FALSE;
-    }
+  // The re-parenting process always needs to be invoked, since there is no
+  // guarantee that {menu_links} does not contain stale data caused by a
+  // re-parenting process that went wrong in a previous rebuild.
+  if (!empty($item['plid'])) {
+    $parent = db_query("SELECT * FROM {menu_links} WHERE mlid = :mlid", array(':mlid' => $item['plid']))->fetchAssoc();
   }
   else {
     $query = db_select('menu_links');
@@ -2585,10 +2584,9 @@ function menu_link_save(&$item) {
     if ($item['module'] == 'system') {
       $query->condition('module', 'system');
     }
-    else {
-      // If not derived from a router item, we respect the specified menu name.
-      $query->condition('menu_name', $item['menu_name']);
-    }
+    // Always respect the link's menu name. Inheritance for router items is
+    // ensured in _menu_router_build().
+    $query->condition('menu_name', $item['menu_name']);
 
     // Find the parent - it must be unique.
     $parent_path = $item['link_path'];
@@ -2603,13 +2601,13 @@ function menu_link_save(&$item) {
       }
     } while ($parent === FALSE && $parent_path);
   }
+  // If a parent link was found, derive its menu.
   if ($parent !== FALSE) {
     $item['menu_name'] = $parent['menu_name'];
   }
   $menu_name = $item['menu_name'];
-  // Menu callbacks need to be in the links table for breadcrumbs, but can't
-  // be parents if they are generated directly from a router item.
-  if (empty($parent['mlid']) || $parent['hidden'] < 0) {
+  // If no corresponding parent link was found, move the link to the top-level.
+  if (empty($parent['mlid'])) {
     $item['plid'] =  0;
   }
   else {
@@ -3054,6 +3052,15 @@ function _menu_router_build($callbacks) 
 
         $parent = $menu[$parent_path];
 
+        // Try to inherit the menu name from parent router items.
+        if (!isset($item['menu_name'])) {
+          if (!isset($parent['menu_name'])) {
+            $parent['menu_name'] = db_query("SELECT menu_name FROM {menu_links} WHERE router_path = :router_path", array(':router_path' => $parent_path))->fetchColumn();
+          }
+          if (!empty($parent['menu_name'])) {
+            $item['menu_name'] = $parent['menu_name'];
+          }
+        }
         if (!isset($item['tab_parent'])) {
           // Parent stores the parent of the path.
           $item['tab_parent'] = $parent_path;
Index: modules/menu/menu.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/menu/menu.module,v
retrieving revision 1.217
diff -u -p -r1.217 menu.module
--- modules/menu/menu.module	8 Nov 2009 10:02:41 -0000	1.217
+++ modules/menu/menu.module	14 Nov 2009 14:29:49 -0000
@@ -396,7 +396,12 @@ function _menu_parents_recurse($tree, $m
  * Reset a system-defined menu item.
  */
 function menu_reset_item($item) {
-  $new_item = _menu_link_build(menu_get_item($item['router_path']));
+  // To fully reset the link to its original/suggested values, we need the full
+  // information provided in hook_menu(); e.g. the original 'menu_name'.
+  $menu = menu_get_router();
+  $router_item = $menu[$item['router_path']];
+  $new_item = _menu_link_build($router_item);
+  // Merge certain properties from the current link into the reset link.
   foreach (array('mlid', 'has_children') as $key) {
     $new_item[$key] = $item[$key];
   }
Index: modules/menu/menu.test
===================================================================
RCS file: /cvs/drupal/drupal/modules/menu/menu.test,v
retrieving revision 1.26
diff -u -p -r1.26 menu.test
--- modules/menu/menu.test	10 Nov 2009 17:27:53 -0000	1.26
+++ modules/menu/menu.test	14 Nov 2009 13:58:07 -0000
@@ -370,9 +370,6 @@ class MenuTestCase extends DrupalWebTest
     // Verify menu link.
     $this->drupalGet('');
     $this->assertNoText($title, 'Menu link was reset');
-
-    // Verify menu link.
-    $this->drupalGet('');
     $this->assertText($old_title, 'Menu link was reset');
   }