Cuaron is just trying to make this movie authentic by letting them wear their own clothes during the weekends. And anyways, it never says that Hermione doesnt have a fashion sense- shes a muggle-born and owuld know how to dres ,as well as harry! SAMe with Ron, as his dad is always with muggles....THe draco thing is a little weird, but its like i said before, Cuarons trying to make HIS harry potter movie authentic! It shouldnt matter at all- the thing we should be looking for is the emotional suspense and impact the movie has on us, and how ture he stays to the book- NOT the clothes they are wearing!