Just a heads up I threw together a quick photo screen saver that applies a "ken burns" effect to pictures from any photos in your library. I have not done extensive testing on it, but it has worked on the few machines I've tried it on. You can install it by going into settings -> plugins -> install plugin and add from URL .. use the following URL:
Then under the "General" button in settings there is a "screen saver" drop down.. select "Photos Screen Saver"... There are no options or anything for the screen saver yet.
If you don't actually have any photos in your library this probably won't work either, but then again if that's the case I'm not sure why you'd be installing the plug in
If you have any problems or feedback feel free to send me a direct message.. one thing i know it probably doesn't handle great right now is running in a window vs full screen.. the images don't pan properly and you see black space while it pans around sometimes.