My first character:
Went to Nar Shadaa after Dantooine. Got the transmission from Visquis in the middle of the battle. The transmission was skipped and there was no journal entry. Took a while to figure out I was screwed. Looking at my past saves, I couldn't have prevented this.
Started a second character:
Went straight to Nar Shadaa. After beating Goto's ship, it freezes once I get back on the Ebon Hawk. Tried loading a past save, redid it with different characters again.
I then went back to my save right after Telos. Went to Onderan first instead, then Nar Shadaa. I beat Goto's ship and the same thing happens.
Here's what troubles me: My brother finished the game just fine. He does have a different Xbox, but I've never had any issues with my own Xbox. Every other game runs fine. No other dirty disc errors or anything. My disc is still in perfect condition.
I've spent about 40 hours on this game, and can't get past of Nar Shadaa because Obsidian decided to rush it out, even with bugs that prevented progression. Holiday hype get to you Obsidian? You have no idea how frustrated I am.
EDIT:
For you skeptical people, I have a legit copy of the game and my Xbox is NOT modded.