Two reports in the US suggest special packaging used by Microsoft is to blame for scratched Halo 3 discs.

PC Advisor's US-based sister title, GamePro, says the retention nub of the Halo 3 Collector's Edition fails to keep discs into place. As a result, discs freely roam inside the special packaging and become slightly scratched.

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The minor scratches appear to be aesthetic, however. All affected discs reportedly play as intended when inserted into an Xbox 360. Still, it's impossible to tell at present if scratches will become a problem moving forward.

Microsoft CEO Steve Ballmer promised in July that his company would be "world-class when we do hardware" after it was revealed that an abnormal number of Xbox 360 units fail. A month later, Microsoft sent Halo 3 to manufacturing.

Microsoft was not immediately available for comment.

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Xbox 360 review