I see segfaults when using simple maplotlib/pylab features:

$ ipython --matplotlib
import pylab
import numpy as np
x = np.random.randn(16, 16)
pylab.imshow(x)
exit()
Segmentation fault

My matplotlibrc:

backend: WXAgg

This is on Linux w/ matplotlib 1.5.0, python 2.7.10 and wxPython 3.0.2.0. I got this failures using Enthought Canopy, but could reproduce it w/ anaconda and debian packages (debian being 1.5.0rc2). I could also see it on windows and mac, so I don't think it is a packaging issue.