Fabrik 3.8.1 has been released. It is mostly bug fixes and feature enhancements, but does include two new plugins (push notifications, and the sequence element). As usual we strongly recommend testing the new release on a sandbox if your application is mission critical, and always do an Akeeba backup before updating.
Scheduled task plugins
"System - Fabrik Scheduled Tasks " plugin must be installed and enabled(top)Otherwise you can add scheduled tasks and run them manually from the backend but they won't be triggered automatically.
At the time of writing (Aug 2014) you must get it from GitHub