Re:EEPROM: Erase a zero word before writing?
Seriously is this used for critical operations that could result in harm to a person? If so then you should talk to Microchip about this.
Random Changes? The good old classic cosmic ray, could hit the chip and change its value. Its not impossible, the not excatly an everyday event, that it could flip.
Hence, Im happy bet $10 on it staying the same (odds are I'll make a bit of money) but not my life....