For some reason, Shotwell is unable to import or view jpg files downloaded from Facebook. (I doubt that Facebook has much to do with the issue - just mentioning my specifics here).
I hit the download link under a photo on Facebook, choose to save the file, then once it has downloaded I move it from my downloads folder to my pictures folder. I double check that the name ends in .jpg - yet when I search for the file using Import From Folder in Shotwell, its name is watermarked, and therefore cannot be selected or imported. Any thoughts?