I got a 27 inch imac at the apple store. On the side I found a small chip out of the aluminum so I returned it. The new one has a similar chip it's a black chip about the size of two pinheads. Should I return this one or is this normal in the manufacturing process. I hate to be "OCD " over this but I also spent close to 3000. Could anyone else check the sides of the machine to see if there new imac has these marks?