Somebody, sometime, on a thread somewhere on this site was using something to run two versions of the movies and this thing, whatever it was, pointed out visual differences between them. It showed up as different colours and it looked quite odd.
I remember that the changes to the roofs were pointed out there, along with a few other tiny alterations - an explosion or something had been tinkered with.
I really don’t remember this very well but I swear I didn’t dream this…