In iPhoto, I used to have an album I called "Desktop Wallpapers." Why? Well, because in "System Prefs>Desktop and Screensaver," I used to be able to select that album and use photos from that album as my desktop wallpapers. I had around 35 photos in there, and I set the desktop to randomly pick a photo from that album as my wallpaper every 5 minutes. While the "Choose Random Photo every X minutes" drop-down menu is still there, its greyed out if you try to use an iPhoto album as your wallpaper source. It only works for regular, non-iPhoto folders and the standard Apple Wallpapers. On the list, the folders ABOVE the hard-line work with this feature, while the random photo checkbox is greyed out for folders below the hard-line in the list. Now, I have a workaround, but I can't believe I had to put in so much effort in trying to figure it out. Why does Apple take away options like this?