I bought my PS3 in June of 2008. I bought GTA IV the same day and played it for 2 months without any problems. I stopped playing for almost another 2 months and tried to play the game again around Christmas and when I put the disc in, little pink and black squares(pixels) appear on my screen. I took the disc back to where I bought it and they gave me a brand new disc. I tried the game again and still the same problem. It loads just fine, but when it comes to actually being in control of the game, the pixels appear. any suggestions?