This is occuring on a build from recent code (taken this evening). I don't know how long this has been a problem because I was previously on the old alpha code from the website download.
Every JDBC call ends with a rollback. There are no errors reporting a transaction problem or other kind of problem in the debug logs for JBoss.
What could this be?
I have the same problem. Seems to be a feature ;-).
Take a look on my thread:
http://main.jboss.org/thread.jsp?forum=46&thread=7944&message=380744#380744