With the most recent snapshot (13w05a), any idea what the point of having 8 different heights of snow per block is? Of all the things that people have asked for as a feature, I can't say I've ever heard of this one.
Probably just to make the snow behavior a bit more "realistic." But then one wonders why you can't have multiple layers of dirt
, too. And stone, and gravel, and sand, and...