6.5.4 RMAN policy tape streaming behavior - change from 6.5.3.1

NEW in 6.5.4 the RMAN parent job seems to maintain ownership of the child job tapes, so that your jobs reuse the same tapes and don't unload them between jobs.
This process bypasses priority, so even if another job - like a restore or duplication is waiting for that tape, the child backup maintains ownership.
This is a time saver if you write directly to tape.

If you write to a VTL and then want to duplicate the tape via SLP, it causes much troubles.

Does any one know how to turn this "feature" off?