The BBC Watchdog show recently reported on how thousands of people have complained that the Xbox 360 is scratching their discs. In one particular case, MS tried to blame the owner of the 360 for the scratching problem, however tests revealed that discs could scratch even when jumping around while playing Guitar Hero.
We sent the same Xbox 360s to a lab in Hampshire, where special testing equipment replicated the vibrations you'd find in a typical home. The first test simulated walking and caused the consoles no problem at all. Then the boxes were subjected to shock vibration testing, which simulated vibrations equivalent to that of someone putting a book down on the table near the Xbox. The newer console passed with flying colours; however, the older console caused a scratch similar to those experienced by the previous owner.News Source: BBC
Our testers told us that the console had failed "very, very quickly" and that these are the kinds of vibrations you'd expect any household to have - particularly when playing games like Rock Band and Guitar Hero that encourage you to get physically involved.