diff --git a/includes/jquery.drilldown.js b/includes/jquery.drilldown.js
index 3b6f181..c1d3ab2 100644
--- a/includes/jquery.drilldown.js
+++ b/includes/jquery.drilldown.js
@@ -79,8 +79,9 @@
         if (breadcrumb.length > 0) {
           var trail = $(settings.trail);
           trail.empty();
-          for (var key in breadcrumb) {
-            if (breadcrumb[key]) {
+          var numberOfCrumbs = breadcrumb.length;
+          for (var key = 0; key < numberOfCrumbs; key++) {
+            if (breadcrumb.hasOwnProperty(key) && breadcrumb[key]) {
               // We don't use the $().clone() method here because of an
               // IE & jQuery 1.2 bug.
               var clone = $('<a></a>')