Hello all,
After some hour of fighting with, I've found that legend had some
trouble when used with errobar because errorbar return a tuple.
I know that is not a bug but I think it might be a good idea to write a
warning about in the documentation (I mean at
http://matplotlib.sourceforge.net/matplotlib.pylab.html#-legend).
Jean-Luc
PS: by the way, thanks to the developers of matplotlib for their great work.