I received my 27 inch Imac this morning. After unpacking I noticed a small crack in the corner of the screen. Before I call Apple I would like to know if anyone else needed to return their Imac. Do I have to return this unit, wait for them to receive it, and than get a replacement sent to me? Do I have to purchase another one if I want it soon and than ship the defective one back? It is the model with the 768 flash drive so I know no Apple stores carry this. Thank you.