These guys called it a brown out warning or something - caused by voltage dropping below 3.2v. Watch at ~4:30min when they start talking abouit this. No one said fail safe. This implied you've got a prob somewhere that may be interrupting power (bad connection) or the batt you're using isn't up to the task of keep ing voltage high enough to avoid this -

http://www.youtube.com/watch_popup?v=PwnM9pBH9QM#t=233


This was on the SPectrum site btw.