Photo of sandwish shop, by Tien Mao Observant New Yorkers may have noticed that someone's got an ax to grind with Sarah Marshall. There are posters all over town telling the woman that she is maternally hated, she sucks, and that yes, she does look fat in those jeans. The posters are part of an ad campaign promoting the movie Forgetting Sarah Marshall, featuring Kristen Bell as an ex-girlfriend who is difficult to forget.......