plotfile_demo.py broken?

I noticed plotfile_demo.py has recently broken. Seems to be units related. Before I look into it further, is there an obvious fix for anyone else?

Traceback (most recent call last):
  File "plotfile_demo.py", line 18, in <module>
    plotfile(fname, (0,5,6), plotfuncs={5:'bar'})
  File "/home/mdroe/usr/lib/python2.5/site-packages/matplotlib/pyplot.py", line 1513, in plotfile
    func(x, y, **kwargs)
  File "/home/mdroe/usr/lib/python2.5/site-packages/matplotlib/axes.py", line 4104, in bar
    left = xconv.convert( left, units )
TypeError: convert() takes exactly 3 arguments (2 given)
> /home/mdroe/usr/lib/python2.5/site-packages/matplotlib/axes.py(4104)bar()
-> left = xconv.convert( left, units )

Mike

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Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA