[hibernate-dev] 3.5.0-Beta-3 has different behaviour on commit as 3.5.0-Beta-2, is this intended?

-until 3.5.0-Beta-2 a ConstraintViolationException during commit caused an implicite rollback and the exception was wrapped into a javax.persistence.RollbackException -now with 3.5.0-Beta-3 the same ConstraintViolationException during commit is wrapped into a javax.persistence.PersistenceException without implicite rollback Is this a wanted behavior change? If yes, where it is documented? best regards G.D.