Okay... I made the leap to finally do the firmware update last night. I used the PDF and wrote down all my surround settings and such. I then went to the PC and ran the updater program for 1.00.18 (for my NR900) and then back to the receiver to start the "Update Utility". It started just fine, it found my "mSVR" correctly, and then I hit enter and when it should have told me my current firmware version, I got "F/W: Not Found" ... WTF????
So I backed out and went to "2. F/W Version" and hit enter. I got "Ver: Unknown" ... again, WTF???
The point of this is that even though it apparently didn't know my firmware, it also wouldn't let me update it with the new one! Once it said "Not Found" I couldn't get to the "Update OK?" to start things off.