Adapted from the chick-lit favorite by Jennifer Weiner, this seriocomic sob story of wildly different sisters and their estranged grandmother is a throwback to old-fashioned melodramas about the family ties that bind. Once upon a time, Curtis Hanson's sure-handed storytelling and the cast's rock-solid performances would have been taken for granted. But in an era when mainstream American filmmakers seem to have lost the knack for making movies about friendship and family that are neither slapstick nor self-conscious pastiche, its matter-of-fact competence is a minor miracle. Smart, successful, responsible, frumpy Rose Feller (Toni Collette, who gained some 25 lbs. for...