OpenMDAO/OpenMDAO-Framework — pull request #981 by setowns1 (2012-05-24 20:55:10+00:00)
Title: Slot() now checks that klass arg is class or Interface

This was causing problems where GUI would report errors related to __name__.
Passing instance rather than class was common problem in OpenMDAO code, even in documentation => will probably cause pain for users as well.