I bought my Core i5 15" base model tuesday morning. Turns out it has fauty external USB ports. Unlucky? Perhaps not. I called AppleCare, and after running me through some software-based steps, including reinstalling the computer once again from scratch, they transferred me to Customer Relations. After reviewing my case, the customer relations agent said, "Wow. This is the first i5 I have seen problems with. It seems like you've gone through some headache as well. Apple would like to apologize by replacing your unit with an upgraded one. I'm willing to send you the mid-level 2.53 ghz machine with a high res and anti-glare option. Will that be sufficient? Of course I said yes. Now just waiting for the replacement to come.