diff --git a/includes/jquery.drilldown.js b/includes/jquery.drilldown.js
index 5e085fb..29f717c 100644
--- a/includes/jquery.drilldown.js
+++ b/includes/jquery.drilldown.js
@@ -81,12 +81,12 @@
           trail.empty();
           for (var key in breadcrumb) {
             if (breadcrumb[key]) {
-              // We don't use the $().clone() method here because of an
-              // IE & jQuery 1.2 bug.
+              // As of jQuery 1.6, the .attr() method returns undefined for
+              // attributes that have not been set.
               var clone = $('<a></a>')
-                .attr('href', $(breadcrumb[key]).attr('href'))
-                .attr('class', $(breadcrumb[key]).attr('class'))
-                .html($(breadcrumb[key]).html())
+                clone.attr('href', $(breadcrumb[key]).attr('href'))
+                clone.attr('class', $(breadcrumb[key]).attr('class'))
+                clone.html($(breadcrumb[key]).html())
                 .addClass('depth-'+key)
                 .appendTo(trail);