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Hmm, this page http://pyunit.sourceforge.net/unittestgui.html
says it is 1.7 but I think you are right in that I'm
actually using 1.4.1.

The change that I made works for me, so why don't I just
check it in anyway, otherwise we should just remove the -m
flag from run_tests.py

I don't particularly care either way, but it was kind of
cute to see the progress bar indicate 0 errors with the
metakit backend ;)