Yep the movie and every reference in the movie, was 'Philospers' Stone'. But the US is the anomoly 'cause the original Br. edition and movie script is The Philosophers' Stone. What you gotta ask is why the US changes?
Another eg is Mel Gibbson's Aussie film 'Mad Max' being called 'Road Warrior'(or something like that) in the US. Why?? We get all your language and ALL your films and products 'un-Aussified' yet ours have to be Americanified for your market???? V. v. weird!! Kind condensending to you Yanks I reckon; like theyey've got to change/ explain stuff more to you or you won't get it??? Interesting. I wonder who makes these descisions and why???
On the subject, why does the US Hard back of GoF have almost 200!!! pages more than the Aus. Hard back and (I presume) the Br??? I presume the Br is similar to the Aus publication 'cause ours is typeset in Br. (I'm thinking that you need larger print

- Only joshin' O course!!! Can't help myself!!) On day I'd like to sit down with both versions and find out the difference,