Hi,
Not sure when this started, but it may be the latest beta. When you use, "Custom Wheel Images" in a theme, it doesn't look like Bigbox is cacheing those images properly. So if you open the games view, it won't cache any images unless you start scrolling through your games. Also, once the images are cached, if you exit the games view and go back in, sometimes the images are all, or mostly gone.
Thanks