It was with a simple .jpg in safari. Just didnt' work. Same with a lot of downloaded files (downloaded a bunch of mac ads last night 😀), and decompressed .sit folders. My desktop stayed clear as a whsle until I searched for said items.
BUT... for some reason, my computer shut off in it's sleep. When I turned it on this morning, all the crap showed up on the desktop, and now the function works.
I still miss a simple "save image as..."