Source : Free On-Line Dictionary of Computing

mandelbug
     
         /man'del-buhg/ (From the {Mandelbrot
        set}) A {bug} whose underlying causes are so complex and
        obscure as to make its behaviour appear chaotic or even
        {nondeterministic}.  This term implies that the speaker thinks
        it is a {Bohr bug}, rather than a {heisenbug}.
     
        See also {schroedinbug}.
     
        [{Jargon File}]
     
        (1995-02-08)