diff --git a/pywb/static/wombat.js b/pywb/static/wombat.js
index 951fea76..5e6d8325 100644
--- a/pywb/static/wombat.js
+++ b/pywb/static/wombat.js
@@ -1,5 +1,5 @@
 /*
-Copyright(c) 2013-2014 Ilya Kreymer. Released under the GNU General Public License.
+Copyright(c) 2013-2015 Ilya Kreymer. Released under the GNU General Public License.
 
 This file is part of pywb, https://github.com/ikreymer/pywb
 
@@ -18,7 +18,7 @@ This file is part of pywb, https://github.com/ikreymer/pywb
  */
 
 //============================================
-// Wombat JS-Rewriting Library v2.2
+// Wombat JS-Rewriting Library v2.3
 //============================================
 _WBWombat = (function() {
 
@@ -712,7 +712,6 @@ _WBWombat = (function() {
                     var curr = r.target.getAttribute(r.attributeName);
                     var new_url = rewrite_url(curr);
                     if (curr != new_url) {
-                        console.log("REWRITE " + r.attributeName);
                         r.target._orig_setAttribute(r.attributeName, new_url);
                     }
                 }
@@ -729,6 +728,32 @@ _WBWombat = (function() {
     }
 
 
+    //============================================
+    function init_node_insert_obs()
+    {
+        if (!window.MutationObserver) {
+            return;
+        }
+
+        var m = new MutationObserver(function(records, observer)
+        {
+            for (var i = 0; i < records.length; i++) {
+                var r = records[i];
+                if (r.type == "childList") {
+                    for (var j = 0; j < r.addedNodes.length; j++) {
+                        rewrite_attr(r.addedNodes[j], "href", rewrite_url);
+                        rewrite_attr(r.addedNodes[j], "src", rewrite_url);
+                    }
+                }
+            }
+        });
+
+        m.observe(document.documentElement, {
+                                  childList: true,
+                                  subtree: true,
+                                  });
+    }
+
     //============================================
     function rewrite_attr(elem, name, func) {
         if (!elem || !elem.getAttribute) {
@@ -749,11 +774,15 @@ _WBWombat = (function() {
             return;
         }
 
+        var new_value = value;
+
         if (func) {
-            value = func(value);
+            new_value = func(value);
         }
 
-        elem._orig_setAttribute(name, value);
+        if (value != new_value) {
+            elem._orig_setAttribute(name, new_value);
+        }
     }
 
     //============================================
@@ -842,6 +871,7 @@ _WBWombat = (function() {
                         created.contentWindow.WB_wombat_location = created.contentWindow.location;
                     }
 
+
                     override_attr(created, "src");
                 } else if (created.tagName && equals_any(created.tagName, SRC_TAGS)) {
                     override_attr(created, "src");
@@ -1141,6 +1171,11 @@ _WBWombat = (function() {
             Element.prototype._orig_setAttribute = Element.prototype.setAttribute;
         }
 
+        // Node insert observer
+        if (!wb_opts.skip_node_obs) {
+            init_node_insert_obs();
+        }
+
         // ensure namespace urls are NOT rewritten
         init_createElementNS_fix();