I posted something about this in maps, but recently something changed:
What happens is that as an alien you get "stuck" in a place: have you ever played with gorgehook? It's as if you have +hook into a certain point, but you can't get out.
This happened to me first on ns_lucid, so I figured it could've been a map problem. But recently, I heard another play complaining (albeit the same map) of the same problem, but in a different location. As far as my problem went, I was unable to reproduce it whatsoever, and the corner itself seemed fine to me.
But what has me confused now is that this happened to me on ns_nothing! On my way from powersilo to Ventilation; on the ladder that leads up to those few vents. I was about 3/4ths up when I got stuck. It made no sense to me, and I'm not sure whether this is a 3.2 Related bug, or a bug in my config/settings/files (I'm imagining that it's not a map bug seeing as I've played NS for a while and this has never happened to me nor anyone else, as far as I've heard of (and ns_nothing has been around for a while))