I have updated to the latest theme, but the problem still persists. In the time between clicking on a link and the time that the featured post image loads, there is an image of mountains that appears. It’s soon replaced with the featured image, but for those with slow loading connections, the image is going to be there at least for a bit. We would like to replace the image of the mountains, but adding a new photo that is 900 x 300 to the ‘Post Image Featured Background’ does nothing. Let me know if you would like to see screenshots of the issue. There isn’t any way to attach them here so just let me know how you would like me to submit them.