sigsegvs with 4.1.0

Hi list!

Is this bug known? Start ipython -wthread

from mayavi import mlab

Add an array source (pick your favourite data for phi0):

mlab.pipeline.scalar_field(phi0.T, name="phi", transpose_input_array=False)

Go to the pipeline window (open mlab.figure() first, if necessary), click the 
"Add module or filter"-item ON THE PIPELINE (this is crucial)

Doubleclick on Isosurface

Get a SIGSEGV.

This does NOT happen if I use the toolbar buttons to add the Isosurface module 
or if I add them from command line.

Also, the same does NOT happen on 4.0.0 (it does not have that "Add module or 
filter"-item at all).

Cheers,
Juha

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