Is it true that early famicoms were recalled due to compatibilty issues? Which decisions does it cover, and what were the problems?
AFAIK it was about durability of rubber buttons.
There was also some kind of overheating issues:
http://www.famicomworld.com/forum/index.php?topic=5285.msg84160.msg#84160
Rambo cart has graphical glitches on early revisions.