When attempting to bring up the main page of the attached test app, an exception is thrown in the server logs:

09:08:25,254 ERROR [[Persistent Faces Servlet]] Servlet.service() for servlet Persistent Faces Servlet threw exception
java.lang.RuntimeException: Failed to append element[tag: html; attributes: ] into #document
at com.icesoft.faces.context.DOMResponseWriter.appendToCursor(DOMResponseWriter.java:528)
at com.icesoft.faces.context.DOMResponseWriter.startElement(DOMResponseWriter.java:169)
..............
Caused by: org.w3c.dom.DOMException: HIERARCHY_REQUEST_ERR: An attempt was made to insert a node where it is not permitted.
at com.sun.org.apache.xerces.internal.dom.CoreDocumentImpl.insertBefore(CoreDocumentImpl.java:419)

The attached test case is a very basic web app. It has the required ICEfaces jar and myFaces jars along with this context param which tells jboss that the war bundles the JSF implementation:

<context-param>
        <param-name>org.jboss.jbossfaces.WAR_BUNDLES_JSF_IMPL</param-name>
        <param-value>true</param-value>
</context-param>