--- Revision None
+++ Revision 346665373332
@@ -0,0 +1,40 @@
+In [29]: from pymongo.dbref import DBRef
+
+In [30]: a = {'foo': DBRef(collection='bla', database='bar', id='goo')}
+
+
+In [35]: deepcopy(a)
+---------------------------------------------------------------------------
+KeyError                                  Traceback (most recent call last)
+
+/home/namlook/Documents/projets/mongokit-hg/mongokit/<ipython console> in <module>()
+
+/usr/lib/python2.6/copy.pyc in deepcopy(x, memo, _nil)
+    160     copier = _deepcopy_dispatch.get(cls)
+    161     if copier:
+--> 162         y = copier(x, memo)
+    163     else:
+    164         try:
+
+/usr/lib/python2.6/copy.pyc in _deepcopy_dict(x, memo)
+    253     memo[id(x)] = y
+    254     for key, value in x.iteritems():
+--> 255         y[deepcopy(key, memo)] = deepcopy(value, memo)
+    256     return y
+    257 d[dict] = _deepcopy_dict
+
+/usr/lib/python2.6/copy.pyc in deepcopy(x, memo, _nil)
+    169             y = _deepcopy_atomic(x, memo)
+    170         else:
+--> 171             copier = getattr(x, "__deepcopy__", None)
+    172             if copier:
+    173                 y = copier(memo)
+
+/usr/local/lib/python2.6/dist-packages/pymongo-1.9-py2.6-linux-i686.egg/bson/dbref.pyc in __getattr__(self, key)
+     79 
+     80     def __getattr__(self, key):
+---> 81         return self.__kwargs[key]
+     82 
+     83     def as_doc(self):
+
+KeyError: '__deepcopy__'