VTK 4.2.6 + Python 2.3.4 and VTK Examples problem

[Ron Kneusel]

I have installed VTK 4.2.6 and Python 2.3.4.  Both are working and I
can run the VTK Python examples except for those in the GUI directory.
 These always fail with messages similar to this:

/home/rkneusel/VTK/Examples/GUI/Python> python2.3 BoxWidget.py
Traceback (most recent call last):
  File "BoxWidget.py", line 57, in ?
    boxWidget = vtk.vtkBoxWidget()
AttributeError: 'module' object has no attribute 'vtkBoxWidget'

This method of running the other VTK examples, including those that
put up a window (like the medical examples) work properly.

I read a blurb in the MayaVi installation notes that this is due to a
problem with a return value but should not exist in versions of VTK
4.2.5 or higher.

Any help appreciated!

Ron