Pardon?
But there are some legitimate pronunciation differences, some of which I find very odd. One of them is “greasy”: in BrE that would be [GREE-see], but in AmE it becomes [GREE-zee]1. That one still trips me up whenever it comes up, and since some halfwit left a tub of discarded cooking fat in the yard (not the garden!), it comes up with unusual frequency.
That particular one’s a pet peave of mine, but it seems to be regional in America. Most people I know use the S, not the Z. But then you have noise/noisy, which would be more accurately spelled noize/noizy in the US. Boise (BOY-zee) mixes it up, but locals from Idaho will hiss that there is no Z in BOY-see. Bah.
The thing I’ve found more peculiar is the -ise/-ize. I tend to prefer the BrE version, but people tend to stare when an American does that. And we wouldn’t want that, now would we.