anchor.diff:              e.g. "5 hours"
             </form>
           <% end %>
  -        <% if @current_unscheduled_maintenance %>
  -          <h3>(Acknowledged - <%= h @current_unscheduled_maintenance[:summary] %>)</h3>
  -          <% start  = Time.at(@current_unscheduled_maintenance[:start_time]) %>
  -          <% finish = Time.at(@current_unscheduled_maintenance[:start_time] + @current_unscheduled_maintenance[:duration]) %>
  -          <% remain = time_period_in_words( (finish - current_time).ceil ) %>
  -          <p><%= h start.to_s %> -&gt; <%= h finish.to_s %> (<%= h remain %> remaining)</p>
  -          <form action="/end_unscheduled_maintenance/<%= check_path_escaped %>" method="post">
  -            <input type="submit" value="End Unscheduled Maintenance (Unacknowledge)" class="button">
  -          </form>
  -        <% end %>
           <% if @current_scheduled_maintenance %>
  -          <h4>(Scheduled Maintenance - <%= h @current_scheduled_maintenance[:summary] %></h4>
  +          <% maint_msg = "#{@current_scheduled_maintenance[:summary]}" %>
  +          <% maint_msg = maint_msg.length > 0 ? maint_msg : 'no summary given' %>
  +          <h4>In <a href="#scheduled_maintenance_periods">Scheduled Maintenance</a> (<%= h maint_msg %>)</h4>
             <% start  = Time.at(@current_scheduled_maintenance[:start_time]) %>
             <% finish = Time.at(@current_scheduled_maintenance[:start_time] + @current_scheduled_maintenance[:duration]) %>
             <% remain = time_period_in_words( (finish - current_time).ceil ) %>
  
positive.code:         </div>
          <% state_qualifier = @check_enabled ? '' : "DISABLED. Last " %>
          <h3><%= state_qualifier %>State: <%= @check_state ? h(@check_state.upcase) : '' %></h3>
          <% if (['warning', 'critical', 'unknown'].include?(@check_state) and !@current_scheduled_maintenance) %>
            <form action="/acknowledgements/<%= check_path_escaped %>" method="post" class="form-inline">
              <input type="hidden" name="acknowledgement_id" value="<%= @acknowledgement_id %>">
  
negative.code:             Disabled
            <% end %>
  
          <a name="scheduled_maintenance_periods"></a>
          <h3>Scheduled Maintenance Periods</h3>
            <% if @scheduled_maintenances && !@scheduled_maintenances.empty? %>
              <table class="table table-bordered table-hover table-condensed">
  