The new wilderness with the "sharper edges" shows a remarkable tendency to ensnare hapless adventurers, such that an /unstick is necessary. Hills that yesterday were perfectly climbable, I suddenly cannot get through, nor can I climb back down. I've rolled back (0.4.01 installer) to see if this would fix the problems, and it did.
Something else, and I don't know if it's related, is that on-screen models seem to be out of sync with the heightmap -- I've been both waist-deep in earth and about two, three feet above it at various points. The heightmap doesn't seem to have changed though.