I have the exact same issue in the same area. It's as if they painted the car with the spoiler already on and the paint didn't get in that one little crack. It should be covered as a factory defect, IMHO, because that could spread over time and then your whole trunk lid is peeling paint. It's just one of many little issues I keep finding with mine, in addition to the mis-aligned door & dash, driver seat clicking noises and the weather stripping coming loose behind both my rear windows. I'm gonna make a laundry list of these warranty issues for the first time I take the car back to the dealer for work.
