I have played this disk type before maybe 3 weeks to a month ago and it worked just fine. Just yesterday I tried to play a dvd on this type of disk and it didn't work, it wasn't because it was dirty or scratched it just wouldn't register that the disk was there. I tried the other one that I have already played on my 360 once before and it wouldn't read that one either. Unless there were other special updates with the last one that was on tuesday for the HDMI, I don't think that it was that because I don't use HDMI, but I don't know. The disk type is Sony DVD+RDL version 1.1/2.4X and it is 8.5 GB. I have considered that it might be because it is Sony, but I have played one of these disks on my 360 before as I previously stated. I don't know if anyone else is experiencing these problems, but if anyone has any information it would be great. Thanks.