The process variable 'p' is leaking into sub-processes when using the
multiprocessing modules.  The following code demonstrates the problem:

    import sys
    from multiprocessing import Process

    p = 'Correct'

    def test():
        print "Got 'p' of", p

    if __name__ == '__main__':
        if len(sys.argv) == 2 and sys.argv[1] == '-m':
            p = Process(target=test)
            p.start()
            p.join()
        else:
            test()

Running this in SP and MP mode shows the leakage:

    ssmith$ /opt/python-svn/bin/python mpbug.py 
    Got 'p' of Correct
    ssmith$ /opt/python-svn/bin/python mpbug.py -m
    Got 'p' of <Process(Process-1, started)>

This occurs in both 2.6b3 and trunk.