title: Preview for create/edit content doesn't work
body: <p>I'm configuring a DRUPAL site web (that it was previously created) and I'm testing the diferent options.</p>
  
  <p>When I create a new content or edit a old content and change anything and then I click on 'Preview' doesn't appear the recent changes (just appear the old values), I have to save it before.</p>
  
  <p>NOTE: I do the accions as ROOT (it not a privilege problem).</p>
  
  <p>Anyone knows what is happened?</p>