The wallpaper dialog does not remember the folders selected for a slideshow. Reproducible: Always Steps to Reproduce: 1. Set wallpaper style to Slideshow. 2. Select a non-default folder as source for the wallpaper images. 3. Apply the change and close the window. 4. Reopen the wallpaper window – the folder has been forgotten.
*** This bug has been marked as a duplicate of bug 327580 ***