- Patch #1496638 by ksenzee: roll back system_settings_form_submit().

core/modules/system/system.module

@@ -2781,27 +2781,12 @@ function system_settings_form_submit($form, &$form_state) {
   // Exclude unnecessary elements.
   form_state_values_clean($form_state);
 
-  $config_objects = array();
   foreach ($form_state['values'] as $key => $value) {
-    if (isset($form_state['config'][$key])) {
-      $config_name = $form_state['config'][$key]['name'];
-      $config_key = $form_state['config'][$key]['path'];
-      if (empty($config_objects[$config_name])) {
-        $config_objects[$config_name] = config($config_name);
-      }
-      if (!empty($config_objects[$config_name])) {
-        $config_objects[$config_name]->set($config_key, $value);
-        continue;
-      }
-    }
     if (is_array($value) && isset($form_state['values']['array_filter'])) {
       $value = array_keys(array_filter($value));
     }
     variable_set($key, $value);
   }
-  foreach ($config_objects as $config) {
-    $config->save();
-  }
 
   drupal_set_message(t('The configuration options have been saved.'));
 }