A warning appears in the server.log of EAP 5.1.0 CR3 with JBossJTS Transactions installed after its shutdown. See snippet of the log:

...
2010-09-10 09:49:53,657 DEBUG [com.arjuna.orbportability.logging.logger] (Thread-19) OA::destroyRootPOA ()
2010-09-10 09:49:53,658 DEBUG [com.arjuna.orbportability.logging.logger] (Thread-19) RootOA::shutdownObject (Servant)
2010-09-10 09:49:53,658 WARN [com.arjuna.orbportability.logging.loggerI18N] (Thread-19) [com.arjuna.orbportability.OA.caughtexception] shutdownObject caught: org.omg.CORBA.OBJECT_NOT_EXIST: POA destroyed vmcid: 0x0 minor code: 0 completed: No
...

When I set INFO level logging for jacorb I saw that POA had been destroyed a bit earlier to this RootOA::shutdownObject calling, see this:

2010-09-10 09:49:53,598 INFO [jacorb.orb] (JBoss Shutdown Hook) prepare ORB for shutdown...
2010-09-10 09:49:53,598 INFO [jacorb.orb] (JBoss Shutdown Hook) ORB going down...
2010-09-10 09:49:53,599 INFO [jacorb.poa] (POADestructor) POA PPOA destroyed
2010-09-10 09:49:53,599 INFO [jacorb.poa] (POADestructor) POA PPOA destroyed
2010-09-10 09:49:53,600 INFO [jacorb.poa] (POADestructor) POA RcvCo-RecCoService_thinkpax.localdomainrecovery_coordinator destroyed

2010-09-10 09:49:53,600 INFO [jacorb.poa] (POADestructor) POA RootPOA destroyed

2010-09-10 09:49:53,600 INFO [jacorb.poa] (POADestructor) POA IR destroyed
2010-09-10 09:49:53,604 INFO [jacorb.poa] (POADestructor) POA OTSResources destroyed
2010-09-10 09:49:53,607 INFO [jacorb.poa] (POADestructor) POA OTS destroyed
2010-09-10 09:49:53,654 INFO [jacorb.orb.iiop] (ServerSocketListener) Listener exited
2010-09-10 09:49:53,654 INFO [jacorb.giop.conn] (ClientMessageReceptor0) Received CloseConnection on ClientGIOPConnection to 127.0.0.1:3528 (111b024)
2010-09-10 09:49:53,654 INFO [jacorb.orb.iiop] (JBoss Shutdown Hook) Client-side TCP transport to null closed.
2010-09-10 09:49:53,654 INFO [jacorb.orb] (JBoss Shutdown Hook) ORB shutdown complete
2010-09-10 09:49:53,654 INFO [jacorb.util.tpool] (ClientMessageReceptor0) ConsumerTie exited
2010-09-10 09:49:53,655 INFO [jacorb.orb] (Thread-19) ORB run, exit
2010-09-10 09:49:53,655 INFO [jacorb.orb] (ORB thread) ORB run, exit
2010-09-10 09:49:53,657 DEBUG [com.arjuna.orbportability.logging.logger] (Thread-19) OA::destroyRootPOA ()
2010-09-10 09:49:53,658 DEBUG [com.arjuna.orbportability.logging.logger] (Thread-19) RootOA::shutdownObject (Servant)
2010-09-10 09:49:53,657 INFO [jacorb.util.tpool] (ServerMessageReceptor0) ConsumerTie exited
2010-09-10 09:49:53,658 WARN [com.arjuna.orbportability.logging.loggerI18N] (Thread-19) [com.arjuna.orbportability.OA.caughtexception] shutdownObject caught: org.omg.CORBA.OBJECT_NOT_EXIST: POA destroyed vmcid: 0x0 minor code: 0 completed: No
2010-09-10 09:49:53,659 DEBUG [com.arjuna.orbportability.logging.logger] (Thread-19) ORB::shutdown ()

Jonathan, is this anything to worry about?

Steps to reproduce:
1) Unzip EAP 5.1.0 CR3 ZIP installation
2) Install JTS transactions to the 'all' profile
3) Start up and shut down the EAP
4) Check all/logs/server.log for the warning