Hi everyone,

nothing dramatic but I get a warning when I start iyt:

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[19:25:12] lattice:$ iyt

/home/jcpassy/yt-x86_64/lib/python2.7/site-packages/matplotlib/__init__.py:908: UserWarning:  This call to matplotlib.use() has no effect

because the the backend has already been chosen;

matplotlib.use() must be called *before* pylab, matplotlib.pyplot,

or matplotlib.backends is imported for the first time.

  if warn: warnings.warn(_use_error_msg)

Welcome to pylab, a matplotlib-based Python environment [backend: agg].

For more information, type 'help(pylab)'.

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| Welcome to yt! |

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I did not get this problem before I updated to the most recent changeset, and I reproduced the warning on two different Linux machines.
If anyone has an idea about how to get rid of it, please let me know.

Cheers,

JC