Death Star II:
Solution: Turn off vibration.
Reason: During this part of the game, the Xbox 360 is working itself into a frenzy. It has to manage the timer, manage your stud amount, create the flaming fire that chases you, send the demand that your controller vibrate (wirelessly, for most of us), switch cutscenes, ect. But the vibration is probably the most stressful.
If not: If this does not work, the only thing is to make sure your Xbox console is not close to anything generating heat (T.V., computer, heater, etc). If it still doesn't work, your game is a defect and you must swap it.
Battle of Endor:
Solution: Walk into the river. Go roughly 3 steps left. Be sure all characters are visible on screen. Allow them to cross, then follow.
Reason: Common glitch among earlier game discs. I myself bough the game after it came out, and mine was not glitched.
If not: Your game must be exchanged for a new one.
END OF STORY AND THREAD.
For those of you wondering, I do have a gold account.
Mod Edited.