diff --git a/includes/jquery.drilldown.js b/includes/jquery.drilldown.js
index 5e085fb..5e5cd21 100644
--- a/includes/jquery.drilldown.js
+++ b/includes/jquery.drilldown.js
@@ -84,11 +84,16 @@
               // We don't use the $().clone() method here because of an
               // IE & jQuery 1.2 bug.
               var clone = $('<a></a>')
-                .attr('href', $(breadcrumb[key]).attr('href'))
-                .attr('class', $(breadcrumb[key]).attr('class'))
-                .html($(breadcrumb[key]).html())
-                .addClass('depth-'+key)
-                .appendTo(trail);
+                .html($(breadcrumb[key]).html());
+
+                // We don't chain $().attr() method since it may return
+                // undefined in jQuery 1.6+.
+                clone.attr({
+                  'href': $(breadcrumb[key]).attr('href'),
+                  'class': (('depth-'+key)+' '+$(breadcrumb[key]).attr('class'))
+                });
+
+                trail.append(clone);
 
               // We add a reference to the original link and a click handler
               // that traces back to that instance to set as the active link.