This is a non-critical update.
There was a redundant borg_projectable() check in borg_danger_aux(). The redundancy reduced the borg_fear by too much, allowing the borg to be too brave in the face of hounds and other packs of ball-effect breathers.
The borg will no longer consider jammed doors “interesting” unless he is has certain attributes. This is keep him from bashing doors until he starves or runs out of light.