title: Wordpress 3.3 wp_list_pages link_before, link_after or child_of Issue
body: <p>I've recently upgraded wordpress to 3.3 version and the navigation is not working any more because I have spans tags into the menu link added with link_after and link_before.</p>
  
  <p>Also <code>wp_list_pages("title_li=&amp;child_of=".$post-&gt;ID."&amp;echo=0");</code> is not working but <code>wp_list_pages("title_li=&amp;child_of=".$post-&gt;post_parent."&amp;echo=0");</code> is working. All I need is the the submenu for the parent list.</p>
  
  <p>Any ideas?</p>