All current Sakai versions are still using the 1.1.x JSF. It will be great that someone could upgrade the JSF version to 1.2.x (new 2.0 may not work). Current 1.1.x JSF causes a lot of unexpected crashed due to 'duplicated component Id' or error message like:
'javax.faces.el.EvaluationException: Error getting property 'attachList' from bean of type '
This happens for all JSF-based tools such as Forum, Tests&Quizzes, Sign-up Tool. It is caused by the bugs in JSF 1.1.x version .
One immediate solution can be done from the suggestion of this blog:
However, it will be better to upgrade the JSF to a higer version to ultimately fix numerous bugs.
Thanks a lot!