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I am having trouble executing the example for typesetting labels with
latex from http://matplotlib.org/users/usetex.html. Copying the standard
example, tex_demo.py, to a file and executing it gives the following
output:

Traceback (most recent call last):
  File "scratch.py", line 21, in <module>
    plt.savefig('tex_demo')
  File "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 561, in
savefig
    return fig.savefig(*args, **kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/figure.py", line 1421,
in savefig
    self.canvas.print_figure(*args, **kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/backend_bases.py", line
2220, in print_figure
    **kwargs)
  File
"/usr/lib/pymodules/python2.7/matplotlib/backends/backend_agg.py", line
505, in print_png
    FigureCanvasAgg.draw(self)
  File
"/usr/lib/pymodules/python2.7/matplotlib/backends/backend_agg.py", line
451, in draw
    self.figure.draw(self.renderer)
  File "/usr/lib/pymodules/python2.7/matplotlib/artist.py", line 55, in
draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/figure.py", line 1034,
in draw
    func(*args)
  File "/usr/lib/pymodules/python2.7/matplotlib/artist.py", line 55, in
draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/axes.py", line 2086, in
draw
    a.draw(renderer)
  File "/usr/lib/pymodules/python2.7/matplotlib/artist.py", line 55, in
draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/axis.py", line 1105, in
draw
    self.label.draw(renderer)
  File "/usr/lib/pymodules/python2.7/matplotlib/artist.py", line 55, in
draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/text.py", line 594, in
draw
    self._fontproperties, angle, mtext=self)
  File
"/usr/lib/pymodules/python2.7/matplotlib/backends/backend_agg.py", line
241, in draw_tex
    self._renderer.draw_text_image(Z, x, y, angle, gc)
OverflowError: cannot convert float infinity to integer

My system is

Linux mwlaptop 3.16.0-24-generic #32-Ubuntu SMP Tue Oct 28 13:07:32 UTC
2014 x86_64 x86_64 x86_64 GNU/Linux

My matplotlib version is 1.3.1, and I am using standard packages from my
Ubuntu 14.10 distribution.