I have the problem otherway arround. I have a 27" with 2560x1440 resolution and almost every not-standard window (standard = the big ones like object window, render window; non standard = the smaller ones like Item, Weapon, Actor window) you can resize but the parts in it do not rescale, means the default outfit list still can only display three items at the same time and you can't rescale/resize it...)
My advise: Hope for a patch
