MyFaces support

Should I be able to run a MyFaces (JSF 1.1) application on Java EE 5 Preview Edition? When I try to do so, I get an UnsupportedOperationException. The application has some MyFaces customizations so I can't simply remove the MyFaces jars and reconfigure the application to use the Sun RI.

Has anyone tried MyFaces with EE 5?

Thanks,

Jerry