I just have received a new iMac after nearly a month of waiting and have identified two problems out of the box. The first minor problem I have is two fine scratches on the screens bazel. They are hard to spot unless you know about them, and only can be seen when the screen is moved towards more light from the window. The second issue is a sparking usb port when i plug a external hdd that is connect to a power source, however when plugging Apples wired keyboard or my Mophie iPhone charger no sparks are present. The sparks are not big and can only be seen inside the port. Are any of these issues to be concerned about? Should i have my iMac replaced.