They altered the intro.
And the sparring gamebreaker is how you lose access to your teammates after sparring and losing in a certain manner, making them unable to EVER talk to you again or follow you, breaking the entire game in the process since all 3 of them are pretty important.
Eh, that's an easy loadback, not so bad.
The one that really irritates me is the Tomb glitch in KOTOR 1. Then you really lose companions.