I dunno what's wrong with the new pathfinding but both Kerf's get stuck in the river near base, constantly, I get the regular Kerfur getting stuck but Kerfur-O shouldn't, hopefully this is patched because its very annoying.

Yeah it seems to be new. I'll take that occasional stuck over the perpetual spinning on a hill or edge though. 

The snow mode ice pathfinding seems to have broken the normal pathfinding around the river, you can just turn it on (set a key for it in binds) and the issues should go away. (by Bearsjunior)

That's what I do, when I notice him or The Creatures getting stuck.