When running test_multiprocessing in a loop, I see:

test test_multiprocessing failed -- Traceback (most recent call last):
  File "/temp/python/trunk/Lib/test/test_multiprocessing.py", line 1157,
in test_remote
    queue = manager2.get_queue()
  File "/temp/python/trunk/Lib/multiprocessing/managers.py", line 635,
in temp
    authkey=self._authkey, exposed=exp
  File "/temp/python/trunk/Lib/multiprocessing/managers.py", line 887,
in AutoProxy
    incref=incref)
  File "/temp/python/trunk/Lib/multiprocessing/managers.py", line 696,
in __init__
    self._incref()
  File "/temp/python/trunk/Lib/multiprocessing/managers.py", line 743,
in _incref
    dispatch(conn, None, 'incref', (self._id,))
  File "/temp/python/trunk/Lib/multiprocessing/managers.py", line 79, in
dispatch
    raise convert_to_error(kind, result)
RemoteError: 
---------------------------------------------------------------------------
Traceback (most recent call last):
  File "/temp/python/trunk/Lib/multiprocessing/managers.py", line 181,
in handle_request
    result = func(c, *args, **kwds)
  File "/temp/python/trunk/Lib/multiprocessing/managers.py", line 397,
in incref
    self.id_to_refcount[ident] += 1
KeyError: '1033760'
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