I've had Windows 7 since the launch, and a couple of days ago, I set up Desktop Background Slideshow, and I set it to change the picture every 1 day.
However, it's been on the same background since. I changed it to something smaller - every 1 minute - and it changes automatically for that.
Is anyone experiancing the same problem, or know how to fix it? I would really like it to change every day...