Yep, I know what you mean, and yes I have found it a little frustrating if you are scrolling through a lot of pics quite fast. I don't know any way of removing it, but I haven't actually had a good look through the settings, I doubt you can remove it though. A quick tip if you are finding it annoying getting the picture back in it's central position... swipe the pic down to the bottom of the screen (whilst holding it in landscape like you do), once your finger is at the bottom, let go and the picture should 'bounce' back to the centre.