Nice ping pong you play..
I, buildbot get:

Using random seed 2215045
[1/1] test_mailbox
test test_mailbox failed -- multiple errors occurred; run in verbose mode for details
test test_mailbox failed -- Traceback (most recent call last):
  File "/Users/steffen/usr/opt/py3k/lib/python3.3/test/test_mailbox.py", line 1033, in test_lock_conflict
    ipc.signal('done')
  File "/Users/steffen/usr/opt/py3k/lib/python3.3/test/test_mailbox.py", line 1007, in __exit__
    self.c_sock.shutdown(socket.SHUT_RDWR)
socket.error: [Errno 57] Socket is not connected

test test_mailbox failed -- Traceback (most recent call last):
  File "/Users/steffen/usr/opt/py3k/lib/python3.3/test/test_mailbox.py", line 1033, in test_lock_conflict
    ipc.signal('done')
  File "/Users/steffen/usr/opt/py3k/lib/python3.3/test/test_mailbox.py", line 1007, in __exit__
    self.c_sock.shutdown(socket.SHUT_RDWR)
socket.error: [Errno 57] Socket is not connected

/Users/steffen/usr/opt/py3k/lib/python3.3/test/regrtest.py:1082: ResourceWarning: unclosed <socket.socket object, fd=5, family=2, type=1, proto=0>
  gc.collect()
1 test failed:
    test_mailbox
Re-running failed tests in verbose mode
Re-running test 'test_mailbox' in verbose mode

...

======================================================================
ERROR: test_lock_conflict (test.test_mailbox.TestMbox)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/steffen/usr/opt/py3k/lib/python3.3/test/test_mailbox.py", line 1033, in test_lock_conflict
    ipc.signal('done')
  File "/Users/steffen/usr/opt/py3k/lib/python3.3/test/test_mailbox.py", line 1007, in __exit__
    self.c_sock.shutdown(socket.SHUT_RDWR)
socket.error: [Errno 57] Socket is not connected

======================================================================
ERROR: test_lock_conflict (test.test_mailbox.TestMMDF)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/steffen/usr/opt/py3k/lib/python3.3/test/test_mailbox.py", line 1033, in test_lock_conflict
    ipc.signal('done')
  File "/Users/steffen/usr/opt/py3k/lib/python3.3/test/test_mailbox.py", line 1007, in __exit__
    self.c_sock.shutdown(socket.SHUT_RDWR)
socket.error: [Errno 57] Socket is not connected

----------------------------------------------------------------------
Ran 332 tests in 55.487s

FAILED (errors=2)
test test_mailbox failed -- multiple errors occurred
ok

... repeats yet another two times (very long output though)

----------------------------------------------------------------------
Ran 332 tests in 151.484s

OK
[118424 refs]