Index: testrunner.js
===================================================================
--- testrunner.js	(revision 5903)
+++ testrunner.js	(working copy)
@@ -399,7 +399,7 @@
     var args = Array.prototype.slice.apply(arguments);
     var eq = true; // equivalent until we can explicitely say it's not!
     var a, b; // compares a and b (1st and 2nd argument)
-    var len; // for iterating array's length memoization
+    var i, len; // for iterating over objects convenience and for iterating array's length memoization 
 
     if (args.length < 2) {
         return true; // nothing to compare together
@@ -428,8 +428,8 @@
             if (len !== b.length) { // safe and faster
                 return false;
             }
-            for (var i = 0; i < len; i++) {
-                eq = eq && equiv(a[i], b[i]);
+            for (i = 0; i < len && eq; i++) {
+                eq = equiv(a[i], b[i]);
             }
             return eq;
         }
@@ -443,23 +443,26 @@
         }
 
         if (typeof a === "object") {
-            // Verify properties equivalence in both ways:
-
-            // Everything in a should be in b and equivalent and ...
-            for (var i in a) {
-                if (a.hasOwnProperty(i)) {
-                    eq = eq && equiv(a[i], b[i]);
-                }
-            }
-
-            // ... everything in b should be in a and equivalent
-            for (var i in b) {
-                if (b.hasOwnProperty(i)) {
-                    eq = eq && equiv(b[i], a[i]);
-                }
-            }
-
-            return eq;
+            // With Markus Staab's help
+            // see http://groups.google.com/group/jquery-dev/browse_thread/thread/9447a950b40574f
+ 
+            // Verify a's properties with b's properties equivalence 
+            for (i in a) { 
+                if (a.hasOwnProperty(i)) { 
+                    if (!b.hasOwnProperty(i) || !equiv(a[i], b[i])) { 
+                        return false; 
+                    } 
+                } 
+            } 
+ 
+            // Need only to verify that b's property are also a's property 
+            for (i in b) { 
+                if (b.hasOwnProperty(i) && !a.hasOwnProperty(i)) { 
+                    return false; 
+                } 
+            } 
+ 
+            return true; 
         }
 
         if (typeof a === "function") {