diff --git a/app/controllers/site_controller.rb b/app/controllers/site_controller.rb
--- a/app/controllers/site_controller.rb
+++ b/app/controllers/site_controller.rb
@@ -17,6 +17,11 @@
     redirect_to :action => 'index'
   end
 
+  def logout
+    reset_session
+    redirect_to :controller => 'main', :action => 'login'
+  end
+
   protected
   def site_admin_authorization
     if session[:site_id]==nil
diff --git a/app/controllers/sites_controller.rb b/app/controllers/sites_controller.rb
--- a/app/controllers/sites_controller.rb
+++ b/app/controllers/sites_controller.rb
@@ -5,7 +5,7 @@
   # GET /sites
   # GET /sites.xml
   def index
-    @sites = Site.find(:all)
+    @sites = Site.find(:all, :order => 'country_id')
 
     respond_to do |format|
       format.html # index.html.erb
diff --git a/app/controllers/tasks_controller.rb b/app/controllers/tasks_controller.rb
--- a/app/controllers/tasks_controller.rb
+++ b/app/controllers/tasks_controller.rb
@@ -14,15 +14,19 @@
   def view
     base_filename = File.basename("#{params[:file]}.#{params[:ext]}")
     filename = "#{RAILS_ROOT}/data/tasks/#{base_filename}"
+    #filename = "/home/ioi/web_grader/data/tasks/#{base_filename}"
+    #filename = "/home/ioi/web_grader/public/images/rails.png"
     if !FileTest.exists?(filename)
       redirect_to :action => 'index' and return
     end
-    # ask Apache to send the file --- doesn't quite work...
-    #response.headers['Content-Type'] = "application/force-download" 
-    #response.headers['Content-Disposition'] = "attachment; filename=\"#{File.basename(filename)}\"" 
-    #response.headers['Content-length'] = File.size(filename)
-    #response.headers['X-Sendfile'] = filename
-    #render :nothing => true
+
+    response.headers['Content-Type'] = "application/force-download" 
+    response.headers['Content-Disposition'] = "attachment; filename=\"#{File.basename(filename)}\"" 
+    response.headers["X-Sendfile"] = filename
+    response.headers['Content-length'] = File.size(filename)
+    render :nothing => true
+
+    return
 
     send_file filename, :stream => false, :filename => base_filename
   end
diff --git a/app/views/site/prompt.html.haml b/app/views/site/prompt.html.haml
--- a/app/views/site/prompt.html.haml
+++ b/app/views/site/prompt.html.haml
@@ -18,3 +18,7 @@
   After the contest is started, it <b>cannot</b> be paused or stopped.
   %br/
   = submit_tag 'Start the Contest.', :onclick => "return confirm('Are you sure?');"
+
+%br/
+%br/
+= link_to '[log out]', :action => 'logout'
diff --git a/app/views/site/started.html.haml b/app/views/site/started.html.haml
--- a/app/views/site/started.html.haml
+++ b/app/views/site/started.html.haml
@@ -26,4 +26,6 @@
   Time left: 
   = "#{Time.at(@site.time_left).gmtime.strftime("%X")}"
 
-
+%br/
+%br/
+= link_to '[log out]', :action => 'logout'
diff --git a/app/views/sites/index.html.erb b/app/views/sites/index.html.erb
--- a/app/views/sites/index.html.erb
+++ b/app/views/sites/index.html.erb
@@ -8,7 +8,10 @@
   </tr>
 
 <% for site in @sites %>
-  <tr>
+  <% background = "white" %>
+  <% background = "grey" if (site.started==true) and (site.finished? == true) %>
+  <% background = "lightgreen" if (site.started==true) and (site.finished? != true) %>
+  <tr style="background: <%= background %>;">
     <td><%=h site.name %></td>
     <td><%=h site.started %></td>
     <td><%=h site.start_time %></td>