... talk? I've been killing everything in Citadel.
I had the same problem. Prior to the 1.42 patch, I was at the Parcours section. From the moment I walked in I was attacked by all of the guards, named and unnamed. I had read posts where people were saying they 'talked' with characters in the Parcours area, (i.e., talk with the Cook, or talk with the Drilling Instructor, etc.) but I thought they were referring to a 'different' area, other than the Parcours. Come to find out after I restarted the game from the beginning (after I patched to 1.42), I had missed all of the drill room/Parcours quests. Prior to 1.42 I couldn't talk to ANY of the guards. There was no "Rum" quest. The only NPCs that I could interact with were the imps. And on top of all of that, whenever I killed the guards, I would find (no kidding) no less than a total of at least 700 arrows (of every make, normal, splitters, explosives, spiritual, ethereal, poison, water, fire, earth, air, etc.) I didn't mind *that* bug. LOL So, perhaps the reason you haven't been able to 'talk' with anyone at the Parcours is because you're not patched to 1.42.
(Just a thought). This was nearly a game stopper for me because I had already restarted the game several times due to other bugs in previous patches. I'm glad I stuck with the game, though. I was finally able to generate those quests and play the game as it was intended.
Faralas <img src="/ubbthreads/images/graemlins/mage.gif" alt="" />
EDIT: Please note: I wore the Citadel uniform. I got it from the 1st guard I killed. So, I was in disguise AND I was still attacked. I think my game was simply buggy. (Otherwise, that seems to be a pretty stiff penalty for simply neglecting to put on a uniform. Or am I misunderstanding???)