Well, I've been playing for a while with invulnerability on - with my studying and things I don't have the time to play through it without invulnerability - and I've found that it stops me from advancing the handmaiden side quest, and I assume it'll cause trouble with Kreia later on.
So how do I turn it off? I've tried entering the code again, I've tried "invulnerability 0" like in KOTOR 1, but nothing works. Any ideas?