mpl version 1.0.0
nr, nc = C.shape
nr, nc = C.shape[:2]
While you are at it, you could also change line 6759
numRows, numCols = C.shape
numRows, numCols = C.shape[:2]
(still some other things further down then crash, but this [second fix] is a start on that)
A lot more work will be needed to make everything (_pcolorargs, PcolorImage, pcolorfast,...) work with RGB(A) arrays. How do I get a password/user name to check you the svn sources so I can send in patches in a more useful way? Just sign up for the devlop mailing list?