Will someone correct me if I'm wrong about this?

As far as I can tell, writing (i.e. erase-writing) to any PIC EEPROM 
address will disrupt the stored charge in neighboring memory cells. 
Eventually, if written enough times, EEPROM data corruption may result. 
Microchip recommend using an EEPROM refresh routine periodically, in 
cases where erase-write cycles are likely to approach 1- to 10-million 
times ("specification D124").

I'm only asking so I can make a sensible choice between EEPROM and Flash 
program memory, for storing some infrequently changed non-volatile 
constants.

Thanks

Matt
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