UPDATE: I succeeded in storing most of the settings to the 861 (downloading all of the most recent firmware updates apparently cured the problem). However, I was not able to complete the room correction process. After taking an initial measurement, the program reports that the 861 fails to reset.

2-Channel: Mer 800, Wadia 170i, Ipod, Berkeley DAC, Clayton M300 Amps, Martin Logan Spires
Multi-channel: Oppo BDP-83, Mer 800, HD621, Mer 861, Clayton/Rowland/Classe amps, Martin Logan Spires & Stage, Revel Embrace, REL Stentor