Seeing as how my three previous xbox's are "open tray" as well, and they won't read anything at all, I was a bit confused as to why my current Xbox reads all other discs except for those released in the past two months. I purchased Batman: Arkham City and Modern Warfare 3 at their release dates, and neither will read on my Xbox. It will read everything else - and it isn't the discs, they work great in a friends Xbox. I've cleared my cache, and removed my HDD completely, still will not read those two. I'm pretty sure that the new update bricked my 2009 Xbox! Awesome!