Could you include the option to set a folder and have it recursively search that folder for wallpapers. I use the random image option for slideshow and currently to get all my sorted wallpapers to show up i have to make link's to them all in a single folder. And it gets to be a pain since i like to keep my images in order it would be a nice option to have. Where you can set a folder and have it recursively use all sub folders for wallpapers.
*** This bug has been marked as a duplicate of bug 12561 ***