This is a long standing problem with the xxx6 series as well. They react to the RFID# sent with an IR command. If you only have one Denon receiver in the home, with an 850 at least, you can get around the problem by setting the RF ID# to 0 on both the remote and the base station. For more than one Denon receiver, you need to use the new MSC-400 system controller, which can control multiple Denon receivers without ever sending an RFID# to the emitter.
Mike
www.SurfRemoteControl.com