hello, i play last day a combat map, i can crouch into a box.
i realy dont know the name
you start at a big room (going down behind command console) and in the center of the map is a way to go up (many times lerks are there)
before you enter hive you need to go up a ladder or you come from right side.

sorry i dont have natural selection on my pc.

BUG:
if you jump one the (red?!) boxes you are going to the corner of the last and crouch, then you fall a little bit in the last one box and you are out of the world.

Um, I think you are talking about a known issue on co_faceoff, but really we need much more information then this to do any sort of investigation or cataloging of an issue.