My Aura is the only reader that I've broken too. I used to carry my Pocket Pro and my Kobo Mini in my pockets all the time, and never had any issues. I went to read Skin Game one day, and my screen was toast.
Now I'm back to a rooted Nook STR. (I hate these screens that have the IR sheet to register page turns, my Aura was the next best thing to my PP's physical page-turn buttons.)