I purchased a new iPad Air on Black Friday and several times since then the dynamic wallpaper (floating bubbles) has frozen, meaning the bubbles have stopped floating around the screen and they have turned oval in shape instead of round. To get it working again I have to go back into the wallpaper preferences and chose the wallpaper again. I have searched and can't find another thread on this. Anyone else having this problem? I'm assuming it's another iOS7 memory issue.