So I got my iPad from UPS on April 3rd (and it really was a glorious day). First thing I did was inspect it. I noticed that in each corner of the glass there was a nearly-invisible mark around the corner. It looked almost like excess glue. I assumed it was from the plastic sheet protecting the screen in the box. Now it's 20 days later and I can definitely confirm it isn't anything removable. Almost looks like its something under the glass (maybe excess glue?). On one hand, my iPad works great and it's really just aesthetic blemish. On the other hand it bothers me, and I did pay $600 for this thing. What should I do? And does anyone know if Apple replaces unit a for defects like this anyway?