While watching the ending CG sequences of MGS4, the game froze and displayed a cd icon with an exclimation mark in the top left hand side. I could not do anything but manually hard reset the system. Everything came back up fine (XMB) but now the drive no loanger reads anything. I have tried all formats. Sony is replacing the unit with a new 40gig after a few minutes on the phone with tech support. Thought I would share, still love my PS3 and blu-ray movies. I'm just mad I didnt get to watch the ending of MGS4.