I have a mid 2009 macbook, 2.13 Intel core 2 duo, running 10.7.4. When I click on about this mac everything looks right, but when I double click on the "version 10.7.4" to reveal the serial number, it does not match the serial number listed on the macbook itself beneath the battery. And then when I click on "more info..." it says "Mac Mini" late 2009, and once again lists the serial number that does not match the one located beneath the battery. The two serial numbers are off by just one digit, the last one. When I enter the serial number about this mac gives me into www.appleserialnumberinfo.com, it directs me to a late 2009 mac mini. When I enter the correct one, located beneath the battery, it directs me to a mid 2009 macbook. I did recently have the logic board replaced by apple about a month ago. My applecare warranty ends in a couple weeks and I'm wondering if this is something I need to go to apple about. any theories on why the "about this mac" would give me a wrong serial number, and why it thinks it's a Mac Mini?