I'm the developer of Reddit In Pictures and I'm sorry about that issue, please go into 'Settings' and disable ads!

I just wanted to give as much space for images as possible, so when the ad loads it puts itself between the text showing the number of images and the ActionBar, if the ad doesn't load it doesn't take up any space. Is the bounce you're talking about when the ad initially loads (like on orientation change)?

I haven't had a chance to work on that app in a while, but when I have time to re-visit it I will test out making the ad area static so that it never seems to bounce.