I have a Reach Slim, and up until yesterday it was working fine. I was playing Renegade Ops last night though, and I noticed that occasionally (usually when there were screen-filling explosions or a lot of action going on) the sound would freeze/stutter and the gameplay would stop for a second, and then it would continue. This happened maybe four times in 2 hours.
Then a bit ago tonight, I was playing Black Ops multiplayer. I thought at first that I was just lagging, but it turned out to be basically the same thing, since I tried it in offline mode. The screen would skip around and stutter, and voices would sound stuttered for a second. Only on Black Ops, it would happen almost consistently for the duration of the game, whereas in Renegade Ops it was only once in a while.
I just finished Arkham City 2 days ago, and did not have a single issue with it the entire time. So it's either something that spontaneously developed last night, or just a weird anomoly. Has anyone else ever encountered something like this? Any suggestions on how to fix it (and yes, I've cleared my cache :p)? Thanks!