Hello, I just received a PRS600 for my birthday and I'm not sure if it is me or if there is a problem with the screen. I know there have been a lot of complaints about the screen being difficult to see, but I am wondering anyone else has had problems highlighting? When I double tap on a word, the highlight will show up a few inches away from where I intended. I have re-calibrated it several times without any luck. Also, it was purchased from Best Buy, so I am not sure if I can return or exchange it. Any ideas? I would greatly appreciate some help as it is a major purchase for us and I don't want to waste it.