Wait what? You can break locks with your weapon? Does it not work on all locks?
Pretty sure yeah. It doesn't work on all locks (I tried), but I distinctly remember missing my intended target completely and opening a cage door.
EDIT: Went back to the cave and tried again. Same result. The arrow hit the door and it opened right up, freeing the not-so-happy wolf inside to go after the bandits. I used Bound Bow too, so if it works with that, I don't see why it wouldn't work with a sword. Not sure what influences it yet. Maybe someone else knows?