RichFaces 4.2.3.CR1 was released earlier today, thanks Brian! You can check out all the details here, as they include several important fixes for RichFaces 4 in a portlet!
WSRP support for RichFaces 4
In this release we've also improved the support of RichFaces 4 components when a portlet is being used over WSRP, with 76 out of 77 components now supported!
I'd like to thank Brian Leathem and Lukas Fryc for their continued support in getting to the root of any issues that may arise with using RichFaces 4 in portlets, without their support Portlet Bridge would not have almost complete RichFaces4 component support this soon!