Render the attached RIB. The result should be two white five-pointed stars, each with an upside-down five-pointed star inside it. The left figure is a black star on top of a white star; the right figure is a white star with a hole cut in it. The right star renders improperly.
I believe that the RIB's geometry is correct, as it renders correctly in Aqsis, BMRT and 3Delight. The model was adapted from the examples to "Renderman for Beginners", at http://smartcg.com/tech/cg/books/RfB/download/contents/Ch04_GeomPrim/Fig_4.19/index.html.
I'm running Pixie SVN (r1169) on Ubuntu Hardy.