Don't know if it's fixed in the new test build, but at least on 0.8.2b the hiking boots randomly partially stop working. It still lets you climb steep hills and ledges without slipping, but the small increase to the height you can fall from stops working, unless I misremember it doing that. I was unable to reproduce the secondary bug so it either was some sort of freak bug that almost never happens or it was caused by something else that happened between when I last ragdolled from hitting the ground and when I next should have ragdolled from hitting the ground, and I just so happened to get the hiking boots between those two moments. So not sure how to reproduce the bug that causes me to be immune to ragdolling from heights.