Are you guys trying to play split screen or matchmaking? My issue comes from split screen play, maybe I should've made that clear.
But with the latest update, those of you who are experiencing difficulty loading maps on matchmaking, it may be normal. Frankie writes:
"Getting a “dirty disc” message, failing to load a map, or having a party member fail to load a map:
As you play Halo 2, your Xbox makes copies of the maps on your hard drive. Getting the auto-update cleared out those copies, so the maps need to load fresh copies from your DVD. If your poor old disc has suffered abuse and scratching since the last time these files were cleared, you may run into problems. Try cleaning your disc and see whether that helps with the issue. If your disc is badly damaged, you can probably borrow a disc from a friend until you load all the maps for the first time, then switch back to your own DVD. You can force the maps to load one at a time by starting local split-screen games before you go online. It’s also a valuable reminder to take good care of your game discs…"
I however, have been experiencing this problem way before the latest update. It's pretty annoying if I ever want to play split-screen (very very very rarely because it sucks so much ballz compared to H1)