Nothing has changed on my console -- it's not overheating, because it does it from a cold boot. Halo 3 plays just fine, as do a handful of other games, like Battle For Middle Earth 2. However, Bioshock, which on the last level of, now freezes every few seconds, and Oblivion has some issues as well. What changed? The new update Halo 3 put on my 360 ... grrrr ... Anyone else experiencing this?