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 danielbeck :

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