different hash = something has been done to file.

WHOLE PURPOSE of it is to put it on like a read-only meaning, we promise never to touch this. if the hash is different, someone who shouldn't be touching it touched it.

so if it's changed someone fucked with it we can't tell how. unless we have the correct-hash versions stored off line somehwere (which lots of good people do). so they gotta get in to it tho, right? or have i missed something..?