When something in Drupal does not seem right, the first step is to clear caches. The Clear cache button lives on the Performance page. In the absence of development-helping modules such as admin_menu or devel that can provide one-click access to clearing the cache, we can add the Performance page to our Shortcuts bar for easy-access to the cache-clearing button. This is a solution right in Drupal core slightly easier than memorizing the path admin/config/development/performance.