I'm having the same problem. Have you solved the problem and if so, how?
Yes, I did got it working! I changed the RichFaces version to 3.3.3. Also, there were a problem with nested containers. There were a <a4j:region /> with some nested <a4j:outputPanel />. And this was preventing ajax to correctly perform the request.
We removed the <a4j:region /> and switched some <a4j:outputPanel /> to <h:panelGroup />. Those which did not really need ajax requests.
I hope you get it working too. It was getting me crazy!
Thanks so much for your quick response! Unfortunately that doesn't seem to be our problem. Glad you got yours working!
Would you mind taking a quick look at my post detailing my problem and see if you see any red flags? Thanks again!