diff --git a/core/includes/menu.inc b/core/includes/menu.inc
index 6492b10..de98776 100644
--- a/core/includes/menu.inc
+++ b/core/includes/menu.inc
@@ -1623,6 +1623,9 @@ function theme_menu_link(array $variables) {
  */
 function theme_menu_local_task($variables) {
   $link = $variables['element']['#link'];
+  $link += array(
+    'localized_options' => array(),
+  );
   $link_text = $link['title'];
 
   if (!empty($variables['element']['#active'])) {
@@ -1868,8 +1871,8 @@ function menu_local_tasks($level = 0) {
   $data = &drupal_static(__FUNCTION__);
   $root_path = &drupal_static(__FUNCTION__ . ':root_path', '');
   $empty = array(
-    'tabs' => array('count' => 0, 'output' => array()),
-    'actions' => array('count' => 0, 'output' => array()),
+    'tabs' => array(),
+    'actions' => array(),
     'root_path' => &$root_path,
   );
 
@@ -1921,8 +1924,7 @@ function menu_local_tasks($level = 0) {
     // Tab parenting may skip levels, so the number of parts in the path may not
     // equal the depth. Thus we use the $depth counter (offset by 1000 for ksort).
     $depth = 1001;
-    $actions['count'] = 0;
-    $actions['output'] = array();
+    $actions = array();
     while (isset($children[$path])) {
       $tabs_current = array();
       $actions_current = array();
@@ -1959,6 +1961,7 @@ function menu_local_tasks($level = 0) {
               '#theme' => 'menu_local_task',
               '#link' => $link,
               '#active' => TRUE,
+              '#weight' => isset($link['weight']) ? $link['weight'] : NULL,
             );
             $next_path = $item['path'];
             $tab_count++;
@@ -1971,6 +1974,7 @@ function menu_local_tasks($level = 0) {
               $actions_current[] = array(
                 '#theme' => 'menu_local_action',
                 '#link' => $link,
+                '#weight' => isset($link['weight']) ? $link['weight'] : NULL,
               );
               $action_count++;
             }
@@ -1979,6 +1983,7 @@ function menu_local_tasks($level = 0) {
               $tabs_current[] = array(
                 '#theme' => 'menu_local_task',
                 '#link' => $link,
+                '#weight' => isset($link['weight']) ? $link['weight'] : NULL,
               );
               $tab_count++;
             }
@@ -1986,10 +1991,8 @@ function menu_local_tasks($level = 0) {
         }
       }
       $path = $next_path;
-      $tabs[$depth]['count'] = $tab_count;
-      $tabs[$depth]['output'] = $tabs_current;
-      $actions['count'] += $action_count;
-      $actions['output'] = array_merge($actions['output'], $actions_current);
+      $tabs[$depth] = $tabs_current;
+      $actions = array_merge($actions, $actions_current);
       $depth++;
     }
     $data['actions'] = $actions;
@@ -2035,6 +2038,7 @@ function menu_local_tasks($level = 0) {
               '#theme' => 'menu_local_task',
               '#link' => $link,
               '#active' => TRUE,
+              '#weight' => isset($link['weight']) ? $link['weight'] : NULL,
             );
             $next_path = $item['tab_parent'];
             if (isset($tasks[$next_path])) {
@@ -2045,14 +2049,14 @@ function menu_local_tasks($level = 0) {
             $tabs_current[] = array(
               '#theme' => 'menu_local_task',
               '#link' => $link,
+              '#weight' => isset($link['weight']) ? $link['weight'] : NULL,
             );
           }
         }
       }
       $path = $next_path;
       $parent = $next_parent;
-      $tabs[$depth]['count'] = $count;
-      $tabs[$depth]['output'] = $tabs_current;
+      $tabs[$depth] = $tabs_current;
       $depth--;
     }
     // Sort by depth.
@@ -2061,7 +2065,12 @@ function menu_local_tasks($level = 0) {
     $tabs = array_values($tabs);
     $data['tabs'] = $tabs;
 
-    // Allow modules to alter local tasks or dynamically append further tasks.
+    // Allow modules to dynamically add further tasks.
+    foreach (module_implements('menu_local_tasks') as $module) {
+      $function = $module . '_menu_local_tasks';
+      $function($data, $router_item, $root_path);
+    }
+    // Allow modules to alter local tasks.
     drupal_alter('menu_local_tasks', $data, $router_item, $root_path);
   }
 
@@ -2072,9 +2081,7 @@ function menu_local_tasks($level = 0) {
       'root_path' => $root_path,
     );
   }
-  // @todo If there are no tabs, then there still can be actions; for example,
-  //   when added via hook_menu_local_tasks_alter().
-  elseif (!empty($data['actions']['output'])) {
+  elseif (!empty($data['actions'])) {
     return array('actions' => $data['actions']) + $empty;
   }
   return $empty;
@@ -2187,7 +2194,7 @@ function menu_contextual_links($module, $parent_path, $args) {
 function menu_primary_local_tasks() {
   $links = menu_local_tasks(0);
   // Do not display single tabs.
-  return ($links['tabs']['count'] > 1 ? $links['tabs']['output'] : '');
+  return count($links['tabs']) > 1 ? $links['tabs'] : '';
 }
 
 /**
@@ -2196,7 +2203,7 @@ function menu_primary_local_tasks() {
 function menu_secondary_local_tasks() {
   $links = menu_local_tasks(1);
   // Do not display single tabs.
-  return ($links['tabs']['count'] > 1 ? $links['tabs']['output'] : '');
+  return count($links['tabs']) > 1 ? $links['tabs'] : '';
 }
 
 /**
@@ -2204,7 +2211,7 @@ function menu_secondary_local_tasks() {
  */
 function menu_local_actions() {
   $links = menu_local_tasks();
-  return $links['actions']['output'];
+  return $links['actions'];
 }
 
 /**
@@ -3567,7 +3574,6 @@ function _menu_router_build($callbacks) {
     $item['to_arg_functions'] = empty($to_arg_functions) ? '' : serialize($to_arg_functions);
     $item += array(
       'title' => '',
-      'weight' => 0,
       'type' => MENU_NORMAL_ITEM,
       'module' => '',
       '_number_parts' => $number_parts,
@@ -3575,6 +3581,9 @@ function _menu_router_build($callbacks) {
       '_fit' => $fit,
     );
     $item += array(
+      // Default MENU_DEFAULT_LOCAL_TASKs to a weight of -10, so they appear as
+      // first tab by default.
+      'weight' => ($item['type'] & MENU_DEFAULT_LOCAL_TASK) == MENU_DEFAULT_LOCAL_TASK ? -10 : 0,
       '_visible' => (bool) ($item['type'] & MENU_VISIBLE_IN_BREADCRUMB),
       '_tab' => (bool) ($item['type'] & MENU_IS_LOCAL_TASK),
     );
diff --git a/core/modules/action/action.module b/core/modules/action/action.module
index 6ebf1fb..6396caf 100644
--- a/core/modules/action/action.module
+++ b/core/modules/action/action.module
@@ -69,7 +69,6 @@ function action_menu() {
     'description' => 'Manage the actions defined for your site.',
     'page callback' => 'action_admin_manage',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -2,
     'file' => 'action.admin.inc',
   );
   $items['admin/config/system/actions/configure'] = array(
diff --git a/core/modules/aggregator/aggregator.module b/core/modules/aggregator/aggregator.module
index 047026a..0eac1ad 100644
--- a/core/modules/aggregator/aggregator.module
+++ b/core/modules/aggregator/aggregator.module
@@ -146,7 +146,6 @@ function aggregator_menu() {
   $items['admin/config/services/aggregator/list'] = array(
     'title' => 'List',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
   $items['admin/config/services/aggregator/settings'] = array(
     'title' => 'Settings',
@@ -155,6 +154,7 @@ function aggregator_menu() {
     'page arguments' => array('aggregator_admin_form'),
     'access arguments' => array('administer news feeds'),
     'type' => MENU_LOCAL_TASK,
+    'weight' => 100,
     'file' => 'aggregator.admin.inc',
   );
   $items['aggregator'] = array(
@@ -201,7 +201,6 @@ function aggregator_menu() {
   $items['aggregator/categories/%aggregator_category/view'] = array(
     'title' => 'View',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
   $items['aggregator/categories/%aggregator_category/categorize'] = array(
     'title' => 'Categorize',
@@ -217,7 +216,7 @@ function aggregator_menu() {
     'page arguments' => array('aggregator_form_category', 2),
     'access arguments' => array('administer news feeds'),
     'type' => MENU_LOCAL_TASK,
-    'weight' => 1,
+    'weight' => 10,
     'file' => 'aggregator.admin.inc',
   );
   $items['aggregator/sources/%aggregator_feed'] = array(
@@ -229,7 +228,6 @@ function aggregator_menu() {
   $items['aggregator/sources/%aggregator_feed/view'] = array(
     'title' => 'View',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
   $items['aggregator/sources/%aggregator_feed/categorize'] = array(
     'title' => 'Categorize',
@@ -245,7 +243,7 @@ function aggregator_menu() {
     'page arguments' => array('aggregator_form_feed', 2),
     'access arguments' => array('administer news feeds'),
     'type' => MENU_LOCAL_TASK,
-    'weight' => 1,
+    'weight' => 10,
     'file' => 'aggregator.admin.inc',
   );
   $items['admin/config/services/aggregator/edit/feed/%aggregator_feed'] = array(
diff --git a/core/modules/block/block.module b/core/modules/block/block.module
index 26bcb25..2beac1a 100644
--- a/core/modules/block/block.module
+++ b/core/modules/block/block.module
@@ -146,7 +146,6 @@ function block_menu() {
       'title' => check_plain($theme->info['name']),
       'page arguments' => array($key),
       'type' => $key == $default_theme ? MENU_DEFAULT_LOCAL_TASK : MENU_LOCAL_TASK,
-      'weight' => $key == $default_theme ? -10 : 0,
       'access callback' => '_block_themes_access',
       'access arguments' => array($key),
       'file' => 'block.admin.inc',
diff --git a/core/modules/book/book.module b/core/modules/book/book.module
index f606e48..ddef7a2 100644
--- a/core/modules/book/book.module
+++ b/core/modules/book/book.module
@@ -146,7 +146,7 @@ function book_menu() {
     'page arguments' => array('book_admin_settings'),
     'access arguments' => array('administer site configuration'),
     'type' => MENU_LOCAL_TASK,
-    'weight' => 8,
+    'weight' => 100,
     'file' => 'book.admin.inc',
   );
   $items['admin/content/book/%node'] = array(
diff --git a/core/modules/comment/comment.module b/core/modules/comment/comment.module
index ab757a9..1d0a5f6 100644
--- a/core/modules/comment/comment.module
+++ b/core/modules/comment/comment.module
@@ -221,7 +221,6 @@ function comment_menu() {
   $items['admin/content/comment/new'] = array(
     'title' => 'Published comments',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
   $items['admin/content/comment/approval'] = array(
     'title' => 'Unapproved comments',
@@ -239,7 +238,6 @@ function comment_menu() {
   $items['comment/%/view'] = array(
     'title' => 'View comment',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
   // Every other comment path uses %, but this one loads the comment directly,
   // so we don't end up loading it twice (in the page and access callback).
@@ -250,7 +248,6 @@ function comment_menu() {
     'access callback' => 'comment_access',
     'access arguments' => array('edit', 1),
     'type' => MENU_LOCAL_TASK,
-    'weight' => 0,
   );
   $items['comment/%/approve'] = array(
     'title' => 'Approve',
@@ -258,7 +255,7 @@ function comment_menu() {
     'page arguments' => array(1),
     'access arguments' => array('administer comments'),
     'file' => 'comment.pages.inc',
-    'weight' => 1,
+    'weight' => 10,
   );
   $items['comment/%/delete'] = array(
     'title' => 'Delete',
@@ -267,7 +264,7 @@ function comment_menu() {
     'access arguments' => array('administer comments'),
     'type' => MENU_LOCAL_TASK,
     'file' => 'comment.admin.inc',
-    'weight' => 2,
+    'weight' => 20,
   );
   $items['comment/reply/%node'] = array(
     'title' => 'Add new comment',
diff --git a/core/modules/config/config.module b/core/modules/config/config.module
index a41fc09..f8a1874 100644
--- a/core/modules/config/config.module
+++ b/core/modules/config/config.module
@@ -51,7 +51,6 @@ function config_menu() {
   $items['admin/config/development/sync/import'] = array(
     'title' => 'Import',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
   return $items;
 }
diff --git a/core/modules/config/tests/config_test/config_test.module b/core/modules/config/tests/config_test/config_test.module
index 96d4aa0..a3e426c 100644
--- a/core/modules/config/tests/config_test/config_test.module
+++ b/core/modules/config/tests/config_test/config_test.module
@@ -107,7 +107,6 @@ function config_test_menu() {
   $items['admin/structure/config_test/manage/%config_test/edit'] = array(
     'title' => 'Edit',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
   $items['admin/structure/config_test/manage/%config_test/delete'] = array(
     'title' => 'Delete',
diff --git a/core/modules/contact/contact.module b/core/modules/contact/contact.module
index 053df01..aaf18ed 100644
--- a/core/modules/contact/contact.module
+++ b/core/modules/contact/contact.module
@@ -82,7 +82,6 @@ function contact_menu() {
   $items['admin/structure/contact/manage/%contact_category/edit'] = array(
     'title' => 'Edit',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
   $items['admin/structure/contact/manage/%contact_category/delete'] = array(
     'title' => 'Delete',
diff --git a/core/modules/field_ui/field_ui.module b/core/modules/field_ui/field_ui.module
index a04c0dd..30f69fb 100644
--- a/core/modules/field_ui/field_ui.module
+++ b/core/modules/field_ui/field_ui.module
@@ -67,6 +67,10 @@ function field_ui_menu() {
     'type' => MENU_NORMAL_ITEM,
     'file' => 'field_ui.admin.inc',
   );
+  $items['admin/reports/fields/list'] = array(
+    'title' => 'Entities',
+    'type' => MENU_DEFAULT_LOCAL_TASK,
+  );
 
   // Create tabs for all possible bundles.
   foreach (entity_get_info() as $entity_type => $entity_info) {
@@ -181,9 +185,11 @@ function field_ui_menu() {
               'access callback' => '_field_ui_view_mode_menu_access',
               'access arguments' => array_merge(array($entity_type, $bundle_arg, $view_mode, $access['access callback']), $access['access arguments']),
               'type' => ($view_mode == 'default' ? MENU_DEFAULT_LOCAL_TASK : MENU_LOCAL_TASK),
-              'weight' => ($view_mode == 'default' ? -10 : $weight++),
               'file' => 'field_ui.admin.inc',
             );
+            if ($view_mode != 'default') {
+              $items["$path/display/$view_mode"]['weight'] = $weight++;
+            }
           }
         }
       }
diff --git a/core/modules/filter/filter.module b/core/modules/filter/filter.module
index 1aff070..9890796 100644
--- a/core/modules/filter/filter.module
+++ b/core/modules/filter/filter.module
@@ -151,7 +151,6 @@ function filter_menu() {
     'page callback' => 'filter_admin_format_page',
     'access arguments' => array('administer filters'),
     'type' => MENU_LOCAL_ACTION,
-    'weight' => 1,
     'file' => 'filter.admin.inc',
   );
   $items['admin/config/content/formats/%filter_format'] = array(
diff --git a/core/modules/forum/forum.module b/core/modules/forum/forum.module
index 9ec3ec6..3631f16 100644
--- a/core/modules/forum/forum.module
+++ b/core/modules/forum/forum.module
@@ -114,7 +114,6 @@ function forum_menu() {
   $items['admin/structure/forum/list'] = array(
     'title' => 'List',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
   $items['admin/structure/forum/add/container'] = array(
     'title' => 'Add container',
@@ -139,7 +138,7 @@ function forum_menu() {
     'page callback' => 'drupal_get_form',
     'page arguments' => array('forum_admin_settings'),
     'access arguments' => array('administer forums'),
-    'weight' => 5,
+    'weight' => 100,
     'type' => MENU_LOCAL_TASK,
     'parent' => 'admin/structure/forum',
     'file' => 'forum.admin.inc',
@@ -162,9 +161,9 @@ function forum_menu() {
 }
 
 /**
- * Implements hook_menu_local_tasks_alter().
+ * Implements hook_menu_local_tasks().
  */
-function forum_menu_local_tasks_alter(&$data, $router_item, $root_path) {
+function forum_menu_local_tasks(&$data, $router_item, $root_path) {
   global $user;
 
   // Add action link to 'node/add/forum' on 'forum' sub-pages.
@@ -209,7 +208,7 @@ function forum_menu_local_tasks_alter(&$data, $router_item, $root_path) {
           );
         }
       }
-      $data['actions']['output'] = array_merge($data['actions']['output'], $links);
+      $data['actions'] += $links;
     }
   }
 }
diff --git a/core/modules/image/image.module b/core/modules/image/image.module
index 221e07c..cf97843 100644
--- a/core/modules/image/image.module
+++ b/core/modules/image/image.module
@@ -112,7 +112,6 @@ function image_menu() {
     'page callback' => 'image_style_list',
     'access arguments' => array('administer image styles'),
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => 1,
     'file' => 'image.admin.inc',
   );
   $items['admin/config/media/image-styles/add'] = array(
diff --git a/core/modules/language/language.module b/core/modules/language/language.module
index 987553d..57a5606 100644
--- a/core/modules/language/language.module
+++ b/core/modules/language/language.module
@@ -71,7 +71,6 @@ function language_menu() {
   );
   $items['admin/config/regional/language/list'] = array(
     'title' => 'List',
-    'weight' => 0,
     'type' => MENU_DEFAULT_LOCAL_TASK,
   );
   $items['admin/config/regional/language/add'] = array(
@@ -79,7 +78,6 @@ function language_menu() {
     'page callback' => 'drupal_get_form',
     'page arguments' => array('language_admin_add_form'),
     'access arguments' => array('administer languages'),
-    'weight' => 5,
     'type' => MENU_LOCAL_ACTION,
     'file' => 'language.admin.inc',
   );
diff --git a/core/modules/locale/locale.module b/core/modules/locale/locale.module
index dac0557..7aeb26e 100644
--- a/core/modules/locale/locale.module
+++ b/core/modules/locale/locale.module
@@ -193,7 +193,6 @@ function locale_menu() {
   );
   $items['admin/config/regional/translate/translate'] = array(
     'title' => 'Translate',
-    'weight' => -10,
     'type' => MENU_DEFAULT_LOCAL_TASK,
   );
   $items['admin/config/regional/translate/import'] = array(
@@ -219,7 +218,7 @@ function locale_menu() {
     'page callback' => 'drupal_get_form',
     'page arguments' => array('locale_translate_settings'),
     'access arguments' => array('translate interface'),
-    'weight' => 40,
+    'weight' => 100,
     'type' => MENU_LOCAL_TASK,
     'file' => 'locale.pages.inc',
   );
diff --git a/core/modules/menu/menu.module b/core/modules/menu/menu.module
index e9080fd..c83a5e6 100644
--- a/core/modules/menu/menu.module
+++ b/core/modules/menu/menu.module
@@ -78,7 +78,6 @@ function menu_menu() {
   $items['admin/structure/menu/list'] = array(
     'title' => 'List menus',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
   $items['admin/structure/menu/add'] = array(
     'title' => 'Add menu',
@@ -94,7 +93,7 @@ function menu_menu() {
     'page arguments' => array('menu_configure'),
     'access arguments' => array('administer menu'),
     'type' => MENU_LOCAL_TASK,
-    'weight' => 5,
+    'weight' => 100,
     'file' => 'menu.admin.inc',
   );
   $items['admin/structure/menu/manage/%menu'] = array(
@@ -108,7 +107,6 @@ function menu_menu() {
   );
   $items['admin/structure/menu/manage/%menu/list'] = array(
     'title' => 'List links',
-    'weight' => -10,
     'type' => MENU_DEFAULT_LOCAL_TASK,
     'context' => MENU_CONTEXT_PAGE | MENU_CONTEXT_INLINE,
   );
diff --git a/core/modules/node/node.module b/core/modules/node/node.module
index a37679c..5ebc54c 100644
--- a/core/modules/node/node.module
+++ b/core/modules/node/node.module
@@ -1629,7 +1629,6 @@ function node_menu() {
   $items['admin/content/node'] = array(
     'title' => 'Content',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
 
   $items['admin/reports/status/rebuild'] = array(
@@ -1653,7 +1652,6 @@ function node_menu() {
   $items['admin/structure/types/list'] = array(
     'title' => 'List',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
   $items['admin/structure/types/add'] = array(
     'title' => 'Add content type',
@@ -1728,7 +1726,6 @@ function node_menu() {
   $items['node/%node/view'] = array(
     'title' => 'View',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
   $items['node/%node/edit'] = array(
     'title' => 'Edit',
@@ -1736,7 +1733,6 @@ function node_menu() {
     'page arguments' => array(1),
     'access callback' => 'node_access',
     'access arguments' => array('update', 1),
-    'weight' => 0,
     'type' => MENU_LOCAL_TASK,
     'context' => MENU_CONTEXT_PAGE | MENU_CONTEXT_INLINE,
     'file' => 'node.pages.inc',
@@ -1747,7 +1743,7 @@ function node_menu() {
     'page arguments' => array('node_delete_confirm', 1),
     'access callback' => 'node_access',
     'access arguments' => array('delete', 1),
-    'weight' => 1,
+    'weight' => 10,
     'type' => MENU_LOCAL_TASK,
     'context' => MENU_CONTEXT_INLINE,
     'file' => 'node.pages.inc',
@@ -1758,7 +1754,7 @@ function node_menu() {
     'page arguments' => array(1),
     'access callback' => '_node_revision_access',
     'access arguments' => array(1),
-    'weight' => 2,
+    'weight' => 20,
     'type' => MENU_LOCAL_TASK,
     'file' => 'node.pages.inc',
   );
@@ -1768,6 +1764,7 @@ function node_menu() {
     'page arguments' => array(3, TRUE),
     'access callback' => '_node_revision_access',
     'access arguments' => array(3),
+    'type' => MENU_DEFAULT_LOCAL_TASK,
   );
   $items['node/%node/revisions/%node_revision/revert'] = array(
     'title' => 'Revert to earlier revision',
@@ -1789,14 +1786,14 @@ function node_menu() {
 }
 
 /**
- * Implements hook_menu_local_tasks_alter().
+ * Implements hook_menu_local_tasks().
  */
-function node_menu_local_tasks_alter(&$data, $router_item, $root_path) {
+function node_menu_local_tasks(&$data, $router_item, $root_path) {
   // Add action link to 'node/add' on 'admin/content' page.
   if ($root_path == 'admin/content') {
     $item = menu_get_item('node/add');
     if ($item['access']) {
-      $data['actions']['output'][] = array(
+      $data['actions'][] = array(
         '#theme' => 'menu_local_action',
         '#link' => $item,
       );
diff --git a/core/modules/path/path.module b/core/modules/path/path.module
index 63e5c6c..3a468a0 100644
--- a/core/modules/path/path.module
+++ b/core/modules/path/path.module
@@ -64,6 +64,10 @@ function path_menu() {
     'weight' => -5,
     'file' => 'path.admin.inc',
   );
+  $items['admin/config/search/path/list'] = array(
+    'title' => 'List',
+    'type' => MENU_DEFAULT_LOCAL_TASK,
+  );
   $items['admin/config/search/path/edit/%path'] = array(
     'title' => 'Edit alias',
     'page callback' => 'path_admin_edit',
@@ -78,11 +82,6 @@ function path_menu() {
     'access arguments' => array('administer url aliases'),
     'file' => 'path.admin.inc',
   );
-  $items['admin/config/search/path/list'] = array(
-    'title' => 'List',
-    'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
-  );
   $items['admin/config/search/path/add'] = array(
     'title' => 'Add alias',
     'page callback' => 'path_admin_edit',
diff --git a/core/modules/simpletest/simpletest.module b/core/modules/simpletest/simpletest.module
index d7adb65..760947f 100644
--- a/core/modules/simpletest/simpletest.module
+++ b/core/modules/simpletest/simpletest.module
@@ -50,6 +50,7 @@ function simpletest_menu() {
     'page arguments' => array('simpletest_settings_form'),
     'access arguments' => array('administer unit tests'),
     'type' => MENU_LOCAL_TASK,
+    'weight' => 100,
     'file' => 'simpletest.pages.inc',
   );
   $items['admin/config/development/testing/results/%'] = array(
diff --git a/core/modules/system/system.api.php b/core/modules/system/system.api.php
index eb4de0d..2fe7c0c 100644
--- a/core/modules/system/system.api.php
+++ b/core/modules/system/system.api.php
@@ -1026,8 +1026,7 @@ function hook_menu_link_delete($link) {
  * Alter tabs and actions displayed on the page before they are rendered.
  *
  * This hook is invoked by menu_local_tasks(). The system-determined tabs and
- * actions are passed in by reference. Additional tabs or actions may be added,
- * or existing items altered.
+ * actions are passed in by reference. Additional tabs or actions may be added.
  *
  * Each tab or action is an associative array containing:
  * - #theme: The theme function to use to render.
@@ -1035,30 +1034,24 @@ function hook_menu_link_delete($link) {
  *   - title: The localized title of the link.
  *   - href: The system path to link to.
  *   - localized_options: An array of options to pass to l().
+ * - #weight: The link's weight compared to other links.
  * - #active: Whether the link should be marked as 'active'.
  *
- * @param $data
+ * @param array $data
  *   An associative array containing:
- *   - actions: An associative array containing:
- *     - count: The amount of actions determined by the menu system, which can
- *       be ignored.
- *     - output: A list of of actions, each one being an associative array
- *       as described above.
- *   - tabs: An indexed array (list) of tab levels (up to 2 levels), each
- *     containing an associative array:
- *     - count: The amount of tabs determined by the menu system. This value
- *       does not need to be altered if there is more than one tab.
- *     - output: A list of of tabs, each one being an associative array as
- *       described above.
- * @param $router_item
+ *   - actions: A list of of actions, each one being an associative array
+ *     as described above.
+ *   - tabs: A list of (up to 2) tab levels that contain a list of of tabs, each
+ *     one being an associative array as described above.
+ * @param array $router_item
  *   The menu system router item of the page.
- * @param $root_path
+ * @param string $root_path
  *   The path to the root item for this set of tabs.
  */
-function hook_menu_local_tasks_alter(&$data, $router_item, $root_path) {
+function hook_menu_local_tasks(&$data, $router_item, $root_path) {
   // Add an action linking to node/add to all pages.
-  $data['actions']['output'][] = array(
-    '#theme' => 'menu_local_task',
+  $data['actions'][] = array(
+    '#theme' => 'menu_local_action',
     '#link' => array(
       'title' => t('Add new content'),
       'href' => 'node/add',
@@ -1071,7 +1064,7 @@ function hook_menu_local_tasks_alter(&$data, $router_item, $root_path) {
   );
 
   // Add a tab linking to node/add to all pages.
-  $data['tabs'][0]['output'][] = array(
+  $data['tabs'][0][] = array(
     '#theme' => 'menu_local_task',
     '#link' => array(
       'title' => t('Example tab'),
@@ -1090,6 +1083,25 @@ function hook_menu_local_tasks_alter(&$data, $router_item, $root_path) {
 }
 
 /**
+ * Alter tabs and actions displayed on the page before they are rendered.
+ *
+ * This hook is invoked by menu_local_tasks(). The system-determined tabs and
+ * actions are passed in by reference. Existing tabs or actions may be altered.
+ *
+ * @param array $data
+ *   An associative array containing tabs and actions. See
+ *   hook_menu_local_tasks() for details.
+ * @param array $router_item
+ *   The menu system router item of the page.
+ * @param string $root_path
+ *   The path to the root item for this set of tabs.
+ *
+ * @see hook_menu_local_tasks()
+ */
+function hook_menu_local_tasks_alter(&$data, $router_item, $root_path) {
+}
+
+/**
  * Alter links in the active trail before it is rendered as the breadcrumb.
  *
  * This hook is invoked by menu_get_active_breadcrumb() and allows alteration
diff --git a/core/modules/system/system.module b/core/modules/system/system.module
index 139fb0f..b5bfd28 100644
--- a/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -641,7 +641,6 @@ function system_menu() {
     'title' => 'List',
     'description' => 'Select and configure your theme',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -1,
     'file' => 'system.admin.inc',
   );
   $items['admin/appearance/enable'] = array(
@@ -673,13 +672,12 @@ function system_menu() {
     'access arguments' => array('administer themes'),
     'type' => MENU_LOCAL_TASK,
     'file' => 'system.admin.inc',
-    'weight' => 20,
+    'weight' => 100,
   );
   // Theme configuration subtabs.
   $items['admin/appearance/settings/global'] = array(
     'title' => 'Global settings',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -1,
   );
 
   foreach (list_themes() as $key => $theme) {
diff --git a/core/modules/system/tests/modules/design_test/design_test.module b/core/modules/system/tests/modules/design_test/design_test.module
index b8a1a80..9771ba4 100644
--- a/core/modules/system/tests/modules/design_test/design_test.module
+++ b/core/modules/system/tests/modules/design_test/design_test.module
@@ -75,7 +75,6 @@ function design_test_menu() {
   $items['design_test/list'] = array(
     'title' => 'List',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
   // Lastly, add the category containers.
   foreach ($categories as $category) {
diff --git a/core/modules/system/tests/modules/menu_test/menu_test.module b/core/modules/system/tests/modules/menu_test/menu_test.module
index 36cef57..b0bcdc5 100644
--- a/core/modules/system/tests/modules/menu_test/menu_test.module
+++ b/core/modules/system/tests/modules/menu_test/menu_test.module
@@ -124,7 +124,6 @@ function menu_test_menu() {
   $items['menu-test/hidden/menu/list'] = array(
     'title' => 'List menus',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
   $items['menu-test/hidden/menu/add'] = array(
     'title' => 'Add menu',
@@ -146,7 +145,6 @@ function menu_test_menu() {
   );
   $items['menu-test/hidden/menu/manage/%menu/list'] = array(
     'title' => 'List links',
-    'weight' => -10,
     'type' => MENU_DEFAULT_LOCAL_TASK,
     'context' => MENU_CONTEXT_PAGE | MENU_CONTEXT_INLINE,
   );
@@ -178,7 +176,6 @@ function menu_test_menu() {
   $items['menu-test/hidden/block/list'] = array(
     'title' => 'List',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
   $items['menu-test/hidden/block/add'] = array(
     'title' => 'Add block',
diff --git a/core/modules/taxonomy/taxonomy.module b/core/modules/taxonomy/taxonomy.module
index 3a1d297..4754260 100644
--- a/core/modules/taxonomy/taxonomy.module
+++ b/core/modules/taxonomy/taxonomy.module
@@ -252,7 +252,6 @@ function taxonomy_menu() {
   $items['admin/structure/taxonomy/list'] = array(
     'title' => 'List',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
   $items['admin/structure/taxonomy/add'] = array(
     'title' => 'Add vocabulary',
@@ -294,7 +293,7 @@ function taxonomy_menu() {
     'access callback' => 'taxonomy_term_access',
     'access arguments' => array('delete', 2),
     'type' => MENU_LOCAL_TASK,
-    'weight' => 11,
+    'weight' => 20,
     'file' => 'taxonomy.admin.inc',
   );
   $items['taxonomy/term/%taxonomy_term/feed'] = array(
@@ -327,7 +326,6 @@ function taxonomy_menu() {
   $items['admin/structure/taxonomy/%taxonomy_vocabulary_machine_name/list'] = array(
     'title' => 'List',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -20,
   );
   $items['admin/structure/taxonomy/%taxonomy_vocabulary_machine_name/edit'] = array(
     'title' => 'Edit',
@@ -335,7 +333,6 @@ function taxonomy_menu() {
     'page arguments' => array(3),
     'access arguments' => array('administer taxonomy'),
     'type' => MENU_LOCAL_TASK,
-    'weight' => -10,
     'file' => 'taxonomy.admin.inc',
   );
 
diff --git a/core/modules/user/user.module b/core/modules/user/user.module
index 285b9a7..545e6ad 100644
--- a/core/modules/user/user.module
+++ b/core/modules/user/user.module
@@ -1048,7 +1048,6 @@ function user_menu() {
   $items['user/login/default'] = array(
     'title' => 'Username and password',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
 
   $items['user/register'] = array(
@@ -1105,7 +1104,6 @@ function user_menu() {
     'description' => 'Find and manage people interacting with your site.',
     'access arguments' => array('administer users'),
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
     'file' => 'user.admin.inc',
   );
 
@@ -1172,7 +1170,6 @@ function user_menu() {
   $items['admin/config/people/accounts/settings'] = array(
     'title' => 'Settings',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
 
   $items['user/%user'] = array(
@@ -1184,13 +1181,10 @@ function user_menu() {
     'access callback' => 'user_view_access',
     'access arguments' => array(1),
   );
-
   $items['user/%user/view'] = array(
     'title' => 'View',
     'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
   );
-
   $items['user/%user/cancel'] = array(
     'title' => 'Cancel account',
     'page callback' => 'drupal_get_form',
@@ -1199,7 +1193,6 @@ function user_menu() {
     'access arguments' => array(1),
     'file' => 'user.pages.inc',
   );
-
   $items['user/%user/cancel/confirm/%/%'] = array(
     'title' => 'Confirm account cancellation',
     'page callback' => 'user_cancel_confirm',
@@ -1208,7 +1201,6 @@ function user_menu() {
     'access arguments' => array(1),
     'file' => 'user.pages.inc',
   );
-
   $items['user/%user/edit'] = array(
     'title' => 'Edit',
     'page callback' => 'entity_get_form',
diff --git a/core/modules/views/views_ui/views_ui.module b/core/modules/views/views_ui/views_ui.module
index 74c9e07..249f749 100644
--- a/core/modules/views/views_ui/views_ui.module
+++ b/core/modules/views/views_ui/views_ui.module
@@ -46,7 +46,6 @@ function views_ui_menu() {
 
   $items['admin/structure/views/list'] = array(
     'title' => 'List',
-    'weight' => -10,
     'type' => MENU_DEFAULT_LOCAL_TASK,
   ) + $base;
 
@@ -103,7 +102,6 @@ function views_ui_menu() {
     'title' => 'Edit view',
     'type' => MENU_DEFAULT_LOCAL_TASK,
     'context' => MENU_CONTEXT_PAGE | MENU_CONTEXT_INLINE,
-    'weight' => -10,
     'theme callback' => 'ajax_base_page_theme',
   ) + $base;
   $items['admin/structure/views/view/%views_ui_cache/edit/%/ajax'] = array(
@@ -170,17 +168,11 @@ function views_ui_menu() {
   ) + $base;
 
   // A page in the Reports section to show usage of fields in all views
-  $items['admin/reports/fields/list'] = array(
-    'title' => 'List',
-    'type' => MENU_DEFAULT_LOCAL_TASK,
-    'weight' => -10,
-  );
   $items['admin/reports/fields/views-fields'] = array(
     'title' => 'Used in views',
     'description' => 'Overview of fields used in all views.',
     'page callback' => 'views_ui_field_list',
     'type' => MENU_LOCAL_TASK,
-    'weight' => 0,
   ) + $base;
 
   // A page in the Reports section to show usage of plugins in all views.