JBoss AS 4.0.5.GA, MySQL, nothing unusual about config,  Windows XP

Examples I have seen suggest that if you modify or create CMP entitybeans 
inside a session bean method then at the exit of that method these changes will 
be saved to the DB (flushed without calling em.merge or em.persist).  I am not 
seeing this behavior. I have an app that I did several iterations of the above 
and the data is never saved.

Calling em.flush() doesn't work either.  If I call em.merge() it works?  The 
merge call works but as documentation suggests that is inefficient.  What's the 
deal?

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