anchor.diff:  
         <%= f.submit "Submit a reply" %>
       <% end -%>
  -
  +    <% end -%>
     <% end -%>
   
  +<% cache "footer-" + messageboard.cache_key do %>
     <footer>
       <nav class="breadcrumbs">
         <ul>
  
positive.code:       </ul>
      </nav>
    </footer>
  
negative.code: <% end %>
  
    <header>
      <% cache "header-" + messageboard.cache_key do %>
        <nav class="breadcrumbs">
          <ul>
            <li><a href="/">Forums</a> &rarr; </li>
            <li><%= link_to messageboard.title, messageboard_topics_path(messageboard) %> &rarr; </li>
          </ul>
        </nav>
      <% end %> 
  
      <% cache "header-" + topic.cache_key do %>
        <h1><%= topic.title %></h1> 
        <h2><%= topic.posts_count %> posts</h2>
        <% if topic.users_to_sentence %>
          <cite><%= topic.users_to_sentence %></cite>
        <% end %>
      <% end %>
    </header>
    
    <% cache "posts-" + topic.cache_key do %>
      <%= render topic.posts %>
    <% end %>
    
    <% if messageboard.posting_for_anonymous? || (current_user && current_user.can_post_to?(messageboard)) -%>
      <% cache "form-" + topic.cache_key do %>
      <%= nested_form_for([messageboard, topic, @post], 
                          :url => create_messageboard_topic_post_url(messageboard, topic, @post, :host => site.cached_domain),
                          :html => { :multipart => true }) do |f| %>
  