Oddly enough, Halo 4 has been the buggiest of all the games for me. The game sometimes stutters at times, I've seen textures pop (while I didn't see any for CEA), and the cutscenes all play layered on top of the gameplay. Where there are normally black bars, I can see the game paused at the point where the cutscene triggered, so I'm stuck looking at a cutscene playing on top of a paused image of the game. It's quite frustrating.