I was just about to create a topic about this. It happened no matter what setting it was on, and primarily between home screen page flips and going from screen saver to home screen. Not quite as much in books.
I contacted amazon, they were not able to fix it, and sent a new one. Well, this is how the new one arrived, and needless to say, it is not any better. It LITERALLY arrived IN THE BOX like this.
I am not impressed.
