anchor.diff:    <%= timeslot_talks_tr(@periods_by_time_and_scene[3]) %>
     <%= timeslot_tr("10:00&nbsp;&#8209;&nbsp;10:45", @periods_by_time_and_scene[4]) %>
     <%= timeslot_talks_tr(@periods_by_time_and_scene[4]) %>
  -  <%= timeslot_tr("10:00&nbsp;&#8209;&nbsp;10:45", @periods_by_time_and_scene[5]) %>
  +  <%= timeslot_tr("11:00&nbsp;&#8209;&nbsp;11:45", @periods_by_time_and_scene[5]) %>
     <%= timeslot_talks_tr(@periods_by_time_and_scene[5]) %>
     <tr><td class="time">12:00&nbsp;&#8209;&nbsp;13:00</td> 
           <td colspan="3" class="slot restaurant"> 
  
positive.code: 
  
  <table class="schedule" summary="This table shows the schedule for the second day of the Smidig 2009 conference on October 23rd."> 
    <caption>22. oktober</caption> 
    <colgroup class="times"> 
      <col /> 
      </colgroup> 
  
negative.code: 
  <p>Under konferansen kan du følge med på oppdateringer <a href="http://twitter.com/smidig">på Twitter!</a></p> 
  
  <table class="schedule" summary="This table shows the schedule for the first day of the Smidig 2009 conference on October 22nd."> 
    <caption>22. oktober</caption> 
    <colgroup class="times"> 
      <col /> 
  