Its Mountain stage for me : I can get 56/57 on Desert, and 1:02 on Snow, but am stuck up at 1:06 on Mountain.
I dont mind too much - as its by far the best stage IMO, but need to work out what I'm doing wrong!
If its only started saving high scores - does this mean that you can now access the other 2 cars? think you need 50 races or something?