Within the code we have some Info.java classes that are supposed to be able to give back important build-time information. Looks like that is being lost or incomplete these days:

<module-info name="arjuna"><source-identifier>unknown</source-identifier><build-information>JBoss Inc. [kevin] (Linux 2.6.17-1.2157_FC5)</build-information><version>unknown</version><date>2006/Aug/04 15:26</date><notes></notes><configuration><properties-file dir=".">jbossjta-properties.xml</properties-file><object-store-root>/Users/bas/Documents/workspace/adhoc/ObjectStore</object-store-root></configuration></module-info>