I have a similar setup to the other posters, with Theron dead and Arcaan and Senya alive.

I am having the same issue, in addition to what the poster above has tried, I have changed around Kira Carsen's gear, logged out and back in, restarted the game, lowered the graphics settings to see if it was an issue with my video card, and restarted the whole mission twice see if something loaded incorrectly. On both restarts, I was sure to not skip through any dialogue or cutscenes. I am playing a Jedi Sentinal on Satele Shan.