I too run into this grave problem.
After about 15 hours of play, Nar Shadda being my last planet that I haven't finished, and not having a save to revert back to, are forced to wait for the patch and pray that it fixes the problem.
I know its not my comp, because I have installed on about 3 and copied my save, and it happens on all of them.
Guess I'll just have to be happy replaying it through Dark Side for the moment.