Well, recently I tried to insert my Halo 3 disc to play it. Everything was fine at first. Then it took awhile longer to load. When it finally loaded, it said Play DVD.
I'm no rocket scientist, but I know Halo ain't a DVD. When I play it as a DVD, it says in order to play the disc, insert it into an Xbox 360 console.
This is the firsr time that this incident has happened
I'm wondering if it has anything to do with the Xbox Live update I downloaded when I started up the console..
Any help?

EDIT: It seems like this is the only game giving me problems. My GTA IV and Spiderman: Shattered Dimensions play well. ;v