I think I've finally encountered a game breaking bug in Kotor2. I'm at the part where you clear all the sith out of the Telos station, Mandalore turns up, asks if I'm ready then a pre-rendered cutscene of Republic ships arriving plays then...a black screen. If I save and reload then I'm right back where I was, but I can't go anywhere. Mandalore is still there, but talking to him again just brings up the usual conversation tree and there's no way to use the exit he's standing next to.
The bugger of it is that the last save before I got to this area is all the way back in the HK factory (don't know why the bothered restoring that as it's a bloody tedious slog!)