Hi there. I had set my wallpaper to rotate every 15 minutes. And then I found one I'd like to stick with. So, I unchecked the rotate box and selected the wallpaper that I want to stay with. And 15 minutes later it rotates. I restarted, and it went three days without rotating. And today I turned on my Mac and 15 minutes later, it rotated again. Any ideas? Thanks!