stephenmcd/mezzanine — pull request #916 by vindio (2014-01-28 02:24:16+00:00)
Title: Fixed bug in processor_for if it receives an unicode slug (python 2.x)

procesor_for raises "TypeError: issubclass() arg 1 must be a class" if it receives an unicode string (the slug).
It seems that this bug was introduced in Python 3 migration and it happens with python 2.x