=== modified file 'themes/zen/templates/page.tpl.php'
--- themes/zen/templates/page.tpl.php	2009-11-25 17:58:06 +0000
+++ themes/zen/templates/page.tpl.php	2009-11-25 19:24:21 +0000
@@ -198,9 +198,17 @@
         </div></div> <!-- /.section, /#navigation -->
       <?php endif; ?>
 
-      <?php print $sidebar_first; ?>
+      <?php if ($sidebar_first): ?>
+        <div class="region-sidebar-first"><div class="section">
+          <?php print $sidebar_first; ?>
+        </div></div> <!-- /.section, /.region -->
+      <?php endif; ?>
 
-      <?php print $sidebar_second; ?>
+      <?php if ($sidebar_second): ?>
+        <div class="region-sidebar-second"><div class="section">
+          <?php print $sidebar_second; ?>
+        </div></div> <!-- /.section, /.region -->
+      <?php endif; ?>
 
     </div></div> <!-- /#main, /#main-wrapper -->