At work both mpl 1.1 and mpl 1.2 are installed. (I have no idea why.)
Vagaries of our current packaging cause problems (import finds 1.1
before 1.2 in sys.path). The question was what to do. I took a look at
the latest What's New document and concluded that removing 1.1 would
be the best route.
In the process, I also skimmed the 1.3 release notes. What's this? How
was it that I missed the new xkcd style???
Did you know about
http://matplotlib.org/xkcd/gallery.html
I don't know who is responsible for your marketing, but they clearly
need to blanket the world with press releases