My comment was premature - I still get this error. After 4 clean boot sequences, the computer must have had a kernel panic (flashing lights on the keyboard, and no possible recovery), followed by three boots where this error was present.
My comment was premature - I still get this error. After 4 clean boot sequences, the computer must have had a kernel panic (flashing lights on the keyboard, and no possible recovery), followed by three boots where this error was present.