I once had a brand new disc (from a multi disk movie box) which has never been played. When I inserted the disc into a laptop disk drive (those where you have to press the disk onto the holder in the center) the disk completely shattered. It turned out that the material of the disk has aged to a point where it became brittle, despite of never been exposed to UV light or anything else. It probably could have been stored at wrong ambient temperatures in the warehouse. The said disc and the movie box was made in 2004.