The release notes for this version may be found over here:
This release brings with it a collection of improvements including the latest patches and feature work to improve our integration into Tomcat. The best way to get started with that is to take a look at our new quickstarts:
We also added an interesting Software Transactional Memory and vert.x example over here:
We have also managed to get CORBA JTS interop propagation working with Glassfish. You can read more about that in https://issues.jboss.org/browse/JBTM-2623. However validating recovery completes correctly is still in progress so stay tuned for further details in the coming releases...