https://groups.google.com/forum/#!topic/jenkinsci-dev/UtZzYLPQ5JM

I'm using a TransientActionFactory to create a ProminentProjectAction which exposes a jobMain.jelly that should be rendered in the Project page, both for Freestyle Jobs and Maven Jobs.
It's working fine for Freestyle Jobs but not for Maven jobs.

Solution from Daniel Beck :

http://javadoc.jenkins-ci.org/hudson/model/Actionable.html#getActions%28%29 doesn't returns transient actions. It is deprecated and must be replaced by http://javadoc.jenkins-ci.org/hudson/model/Actionable.html#getAllActions%28%29