I am running into this exact same issue (except it is a toolbar and a panel). Everything renders fine except for the RichFaces components. I am using the following in my web.xml:
I know the suspect Rich Faces code in use works on other pages as I've used it in them via a jsp:include. My suspicion is that something in my web.xml is not set up (mapped) to handle the redirect the server does with the error-page. I'm not using anything special there as I'm using the default RichFaces config and default MyFaces config for the servlets and mappings. I know MyFaces is picking it up because those tags are being rendered correctly. It's only the RichFaces components that aren't rendering. Any help would be appreciated.