I can't reproduce on 3k trunk with Ubuntu 10.04, gcc 4.4.3

namedtuples are just a subclass of tuple with only two dunder methods defined (a plain __new__ with empty __slots__).  Can you provoke the same behavior with plain tuples, or a subclass of tuple that looks like one of these?

class Crasher(tuple): pass

class Crasher(tuple):
  __slots__ = ()

class Crasher(tuple):
  def __new__(cls,): return tuple.__new__(cls,)
  __slots__ = ()