Actually, this isn't too far fetched. Many years ago, in a previous life, we had a civil computer being adapted to a military program. One of the tests was to change every bit in the program code from a one to a zero or vice versa and ensure that nothing bad would happen. (The system halting in this test was not considered "bad."
I've read the material on the QANTAS A-330 upset and am favorably impressed with the ATSB's work in this case.
Dick Newman