Index: lib/MochiKit/Sortable.js
===================================================================
--- lib/MochiKit/Sortable.js	(revision 6681)
+++ lib/MochiKit/Sortable.js	(working copy)
@@ -573,7 +573,7 @@
 });
 
 // trunk compatibility
-MochiKit.Sortable.Sortable = MochiKit.Sortable;
+// MochiKit.Sortable.Sortable = MochiKit.Sortable;
 
 MochiKit.Sortable.__new__ = function () {
     MochiKit.Base.nameFunctions(this);
Index: lib/MochiKit/Signal.js
===================================================================
--- lib/MochiKit/Signal.js	(revision 6681)
+++ lib/MochiKit/Signal.js	(working copy)
@@ -863,7 +863,7 @@
 
 MochiKit.Signal.__new__ = function (win) {
     var m = MochiKit.Base;
-    this._document = document;
+    this._document = null;
     this._window = win;
     this._lock = false;
     this._dirty = false;
Index: lib/MochiKit/DOM.js
===================================================================
--- lib/MochiKit/DOM.js	(revision 6681)
+++ lib/MochiKit/DOM.js	(working copy)
@@ -1081,7 +1081,7 @@
 
         this.domConverters = new m.AdapterRegistry();
 
-        var __tmpElement = this._document.createElement("span");
+        var __tmpElement = null;
         var attributeArray;
         if (__tmpElement && __tmpElement.attributes &&
                 __tmpElement.attributes.length > 0) {
Index: lib/MochiKit/Style.js
===================================================================
--- lib/MochiKit/Style.js	(revision 6681)
+++ lib/MochiKit/Style.js	(working copy)
@@ -562,6 +562,7 @@
                                  'INPUT': 'inline-block',
                                  'SELECT': 'inline-block' };
         // CSS 'display' support in IE6/7 is just broken...
+        var navigator = { "userAgent": "" };
         if (/MSIE/.test(navigator.userAgent)) {
             for (var k in this._defaultDisplay) {
                 var v = this._defaultDisplay[k];