Problem with imshow in version 3.2.0

Hi,
I'm having some trouble with the adjustment of the extent of imshow. I would like to scale the image, but this
doesn't work:

imshow(s,extent=[0,255,0,255,80,80])

this leads to following error:
  File "/usr/lib/python2.6/dist-packages/enthought/mayavi/tools/helper_functions.py", line 32,
in the_function
    return pipeline(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/enthought/mayavi/tools/helper_functions.py", line 69,
in __call__
    return self.build_pipeline()
  File "/usr/lib/python2.6/dist-packages/enthought/mayavi/tools/helper_functions.py", line 97,
in build_pipeline
    object = pipe(object, **this_kwargs)._target
  File "/usr/lib/python2.6/dist-packages/enthought/mayavi/tools/modules.py", line 149, in __init__
    super(DataModuleFactory, self).__init__(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/enthought/mayavi/tools/pipe_base.py", line 150, in __init__
    self.set(**traits)
  File "/usr/lib/python2.6/dist-packages/enthought/mayavi/tools/pipe_base.py", line 166, in set
    callback()
  File "/usr/lib/python2.6/dist-packages/enthought/mayavi/tools/modules.py", line 91, in _extent_changed
    tools.set_extent(self._target, self.extent)
  File "/usr/lib/python2.6/dist-packages/enthought/mayavi/tools/tools.py", line 270, in set_extent
    xmin, xmax, ymin, ymax, zmin, zmax = module.actor.actor.bounds
AttributeError: 'ImageActor' object has no attribute 'actor'

if anybody has a clue where the problem is, i would be grateful to let me know.

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