In the Japanese version of Crisis Core, if Zack is KO'd during a side mission, it is a Game Over. In the international versions, the game treats it as if you abandoned the mission and return you to the save point. This actually leads to an exploit where you can steal an infinite amount of otherwise rare Phoenix Downs from the Bonus Boss and use them to max out your cash and all your materia.
The statue of the Goddess in the Japanese version was changed in the other versions of the game because the original statue resembled too much like the statue of the Virgin Mary.