The following issues have been found after testing sample apps from IF4 trunk with Mojarra 2.3 (javax.faces-2.3.0-m09) JSF; any of these issues cannot be reproduced with the default Mojarra 2.2.14.

1) auction - is not functional; bids cannot be placed, item details can be viewed only if clicking twice on the arrow icons.
A JS error occurs when trying to place bids (MsEdge):
SCRIPT5022: jsf.ajax.request: Form has no view state element
jsf.js.jsf (1,34846)

2) emporium - the application cannot be loaded in a browser because of an HTTP Status 500.
The page renders this error:

HTTP Status 500 - javax/enterprise/context/spi/Contextual
type Exception report
message javax/enterprise/context/spi/Contextual
description The server encountered an internal error that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: javax/enterprise/context/spi/Contextual
    javax.faces.webapp.FacesServlet.service(FacesServlet.java:681)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
    org.icesoft.util.servlet.RequestLoggerFilter.doFilter(RequestLoggerFilter.java:74)
    org.icesoft.util.servlet.CustomHeaderFilter.doFilter(CustomHeaderFilter.java:82)

root cause
java.lang.NoClassDefFoundError: javax/enterprise/context/spi/Contextual
    java.lang.Class.forName0(Native Method)
    java.lang.Class.forName(Class.java:340)
    com.sun.faces.util.Util.loadClass(Util.java:303)
    com.sun.faces.application.ApplicationImpl.newThing(ApplicationImpl.java:1811)
    com.sun.faces.application.ApplicationImpl.createComponentApplyAnnotations(ApplicationImpl.java:1983)
    com.sun.faces.application.ApplicationImpl.createComponent(ApplicationImpl.java:1210)
    com.sun.faces.facelets.tag.jsf.ComponentTagHandlerDelegateImpl.createComponent(ComponentTagHandlerDelegateImpl.java:588)
    com.sun.faces.facelets.tag.jsf.ComponentTagHandlerDelegateImpl.apply(ComponentTagHandlerDelegateImpl.java:176)
    javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:135)
    javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:96)
    org.icefaces.mobi.component.largeview.LargeViewHandler.applyNextHandler(LargeViewHandler.java:44)
    com.sun.faces.facelets.tag.jsf.ComponentTagHandlerDelegateImpl.apply(ComponentTagHandlerDelegateImpl.java:203)
...........


3) chat
a) The application is functional, however, an NCI popup renders after staying on the page for a few seconds (there is no need to log in to see this NCI popup). There are no server errors, or browser console errors.

b) A server warning occurs when logging out of chat:
Jan 12, 2017 1:58:51 PM org.icepush.LocalPushGroupManager$QueueConsumerTask takeAndExecute
WARNING: Notification queue encountered
java.lang.IllegalArgumentException: Illegal argument notificationEntrySet: '[]'. Argument cannot be null or empty.
        at org.icesoft.util.PreCondition.checkIfIsNotNullAndIsNotEmpty(PreCondition.java:367)
        at org.icepush.NotificationEvent.<init>(NotificationEvent.java:38)
        at org.icepush.Notification.run(Notification.java:174)
        at org.icepush.LocalPushGroupManager$QueueConsumerTask.takeAndExecute(LocalPushGroupManager.java:1828)
        at org.icepush.LocalPushGroupManager$QueueConsumerTask.run(LocalPushGroupManager.java:1758)
        at java.util.TimerThread.mainLoop(Timer.java:555)
        at java.util.TimerThread.run(Timer.java:505)
............


4) showcase
a) Styling issue: the left-side navigation menu links start rendering in blue as in attached screen shot (Capture.PNG), after clicking a link to access the first component.

b) A number of component demos cannot be accessed because of the same "javax.enterprise.context.spi.Contextual" error. As example:
ace:accordion > Overview
ace:breadcrumbMenu > Overview
ace:dataTable > all demos
tooltip > Delegate,
tree > all demos
On these demos, a "javax.enterprise.context.spi.Contextual/java.lang.NoClassDefFoundError" server error popup occurs on page load, and if reloading the page, the error is rendered on the page; the server log has the same error as the one mentioned at issue 2).


c) icecore:defaultAction; ace:chart > Export:
A JS error occurs when trying to access ace:chart > Export demo, or when pressing keys on the icecore:defaultAction demo.
Error: jsf.ajax.request: Form has no view state element
http://localhost:8080/showcase/javax.faces.resource/jsf.js.jsf?ln=javax.faces&stage=Development&v=4_2_0_170112
Line 2470


5) scopes > Application Scope:
The browser console error mentioned at issue 4.c) was reproduced also with scopes > Application Scope demo on IE11/Windows7, and randomly on IE11/Windows10, by clicking fast on the '+' or '-' counter buttons:
SCRIPT5022: jsf.ajax.request: Form has no view state element
File: jsf.js.jsf, Line: 2470, Column: 21


6) fajax:
Test fails, the counter fails to increase to '2' when clicking 'Toggle Test 3' button; instead, it changes to '0'.
No browser console, or server errors.