anchor.diff:  <div class="attachment_tile" id="<%= dom_id(document) %>">
   <% %>
     <div class="attachment_tile_thumb">
  -    <%= link_to "", document, :class => icon_class_for(document), :alt => document.title %>
  +    <%= link_to "", document, :class => icon_class_for(document), :alt => document.title, :title => document.title, :rel=> 'tooltip' %>
     </div>
   
     <div class="attachment_tile_tipsy">
  
positive.code:   $(document).ready(function(){
  
    SocialStream.Repository.init();
  
    $('#<%= dom_id(document) %> .attachment_tile_tipsy a').tipsy({
    delayIn: 0,
  
negative.code:     <%= link_to truncate_name(document.title, :length => 15),
                  document,
                  :alt => document.title,
                  :title => document.title,
                  :rel => 'tooltip',
                  :path => document %>
    </div>
  </div>
  