The Lion features page says:
Interact with photos in screen saver.
New onscreen controls let you pause your iPhoto screen saver and manually flip through the photos in an album without leaving the screen saver.
After upgrading, I've set my screen saver to iPhoto, and it randomly goes through pictures, but whenever I move the mouse, it exits, just like it used to. How do I get this new interactive version?
I have OSX Lion and iPhoto '09.