http://kotaku.com/gaming/defective/halo-3-disc-read-errors-rampant-304600.phpHalo 3 Disc Read Errors Rampant
A storm is brewing in both the Xbox and Bungie forums, where over a
hundred posters have now verified that their copies of Halo 3 are
causing disc read errors. lockups, and even the dreaded RRoD on their
Xbox 360 consoles. From what I can glean from skimming through the 22
pages of replies to the original poster's problem, most of the people
affected purchased the standard edition, though a few are reporting
having the problem on both the standard and the LE version of the
game. Some believe the discs are corrupting the data on the hard disc
itself, as some have had their game discs replaced twice or more now
with similar results, and removing the hard disc seems to keep the
error from occurring with some posters. Some can load the game fine
and play it for short bursts before the problem occurs, while others
are finding the issue limited to certain game modes. Check out the
forum threads for more info on the problems had, and hopefully some
official response will be given about the issue soon.