No, I didn't do the firmware update, and returned the 570 (and the 770). It wasn't just because of this particular issue, though that was a big part of it. Yeah, as your quote indicated, I could do it if I unplugged the HDMI cable to the TV. Unfortunately, that does seem to mean that even if I were to get an Oppo or something, I'd likely have the same issue with SACD playback.