I've noticed that too. It's due to poor panel alinement between the bonnet (hood) and the wing. Mine's got a difference of 4 or 5 mm, but I can live with this slight imperfection on an otherwise great car!
Cooper S BRG/B, Chili, DSC, Overheated seats, auto A/C, OBC, heated mirrors/jets, Boost + CD. delivered 24.09.02 (ordered 11.09.01). MAX tint on back 3 windows. 17" S-Lites with Dunlop summer run-flats. 16" X-Lites with Goodyear Ultra Grip run-flats for winter. Remus exhaust (LOUD !).