Index: django/newforms/widgets.py
===================================================================
--- django/newforms/widgets.py	(revision 6348)
+++ django/newforms/widgets.py	(working copy)
@@ -68,6 +68,10 @@
         return id_
     id_for_label = classmethod(id_for_label)
 
+    def __deepcopy__(self, memo):
+        memo[id(self)] = self
+        return self
+
 class Input(Widget):
     """
     Base class for all <input> widgets (except type='checkbox' and