Has anyone else experienced game disc discoloration? If you look at the bottom of the disc in the right light you can tell a color difference in the opaqueness of the disc. If you have burnt CDs and noticed the difference in color on those, that is kind of the same contrast. The discoloration is not uniform, it is blotchy and coming in from the edges. I believe the games play fine (the two are Smackdown 2008 and Bioshock). Anyone have information on what causes this or if it will lead to disc failure?