I have just received the new 2.2ghz 15" mpb yesterday. Everything is just Apple, prefect! But when I connected my bootable usb drive and boot via "target disk" mode, it boots into a grey screen with the Apple logo standing still. To ensure the problem doesnt comes from the external drive, I tried to boot into it using my old white macbook, without a hitch. The os just load and pops right into OSX (10.6.7). What could be the cause of this problem? And what could I do about it? Thanks! P.S. I am on Apple's 128GB SSD, 10.6.7 EDIT: I used the "Alt" key to select the drive, it shows up. Just won't boot into it.