I've found something that doesn't seem to have been mentioned. I have 2112 stones in my (rather small) fort, and I had reason to TRY to view them in the stocks screen. However, when I try, the selection skips over them, going from logs to rough gems, and vice versa. I had to use the page up/down method (usually used to skip over them) to view them. I do not have this problem with a fort in 40d16 that has about 500 more stones.
I've got this same problem, in fact it skips over not just the stones but the next two items on the list. I can then go up to get to the other two, but if I try to go up to the stones, it skips me three upwards, though I can still see the two non-stones normally by going back down.
Additionally, I managed to gen a map with 40d17 that apparently has nothing alive on it at all. Even after a few years of play there's never been a single vermin, not swarms of flies or individual rats or butterflies, no fish in any of the pools or river. No trees or shrubs, though there is grass and crops will grow where they usually would. No wild animals wander onto the map from any of the three biomes that make it up. It has a chasm that I've breached but there is nothing alive within (It otherwise looks normal), and it has an underground river, pond, lava pipe, and hfs as well though I've not broken into any of those yet. The map does get seiges, and when merchants come they do bring living animals, and the animals on the map because of me can and do breed.
But there's no wildlife of any sort, it's really weird. Other maps I've genned with 40D17 do have life, but I am guessing this is a bug, not a feature?