Thanks Jer, I know you guys are probably as pissed as we are when stuff like this happens. I can put up with a lot of bugs, but when you've been going the "completionist" route and have done every main quest, side mission, dialogue option, and cortex entry.... to have the last act completely stripped from you is pretty f**ked.
Yeah, you are totally right. In my case specifically I have no idea what could have caused that - but I will start digging. Again, sorry - I am also that type of gamer and this would piss me the f*ck off too.