LiftWeb Snippet Failure

// The error

Namespace prefix f on title is not defined

// View

<table>
  <lift:Show.posts>
  <tr>
    <td><f:title>Title</f:title></td>
    <td><f:body>Body</f:body></td>
  </tr>
  </lift:Show.posts>
</table>

// Snippet

class Show {
  
  def posts(html: NodeSeq) =
    Post.findAll.flatMap(post =>
      bind("f", html,
           "title" -> post.title,
           "body" -> post.body))
    
}