Just thought of this possibility, you can slide an image around in a frame, I'm wondering ifit is a bug involving this option. Select an image and in the properties panel select image tab, there should be a option to select free scaling, check to see if it is selected. if it is try adjusting the y position and see if you can reposition the image within the frame. The image might be repositioned by default a set amount of pixels outside of the frame. Perchance have you adjusted the default page deifintion?