Can you consistently make it give you that message? IF it were me, I'd do a full reformat, reflash, reinitial, the whole thing. And then try to recreate the problem. I wouldn't feel comfortable with that message hanging over me even if the system seemed to work OK.
Good points. I powered off and on. No message. At least for now. Maybe the message was caused by the then USB connection with my computer
In any event, when it's time to replace my Defective Donut FW with Good Donut, or Eclair, or Flan, or Prime Rib, I think I will do a full reformat, reflash, reinitial, the whole kit and kaboodle.