An update. This only happens if I haven't viewed the folder in Thunar. Once Thunar has generated the thumbnails then the "Desktop Background Selector" will as well. So, I'm guessing it isn't trying to create it's own thumbnails and just looking for a cache of the image?
An update. This only happens if I haven't viewed the folder in Thunar. Once Thunar has generated the thumbnails then the "Desktop Background Selector" will as well. So, I'm guessing it isn't trying to create it's own thumbnails and just looking for a cache of the image?