I can't get to this right now, but I should be able to look at it in the next day or two. I haven't tried our unit tests against RichFaces 3.1.2 yet, but I'll check it out as soon as I can.
Thanks for your patience,
OK, great! I'll be waiting patiently.. :) Thank you.
My unit tests are passing with RichFaces 3.1.2. So I'm wondering what is different in your case.
Please open up a jira task at http://jira.jboss.com/jira/browse/JSFUNIT. Then attach your JSP/Facelets page and also the resulting HTML.