>>>>>>> FIX!! <<<<<<< (Well at least it works for me). Whenever you click the "add pin" icon and the window comes up with all your file names, once you click on the file name you want and it pops up in the window, click behind the file name and manually add the extention type. For instance if your image is named snow and it's a jpeg, type in .jpg behind "snow" (your file name) before you click the "Open" butten to upload it to Pinterest. It took me forever to figure this one out but at least now it's working. I would love to hear if this worked for you and I hope I explained it clear enough. :)
>>>>>>> FIX!! <<<<<<<
(Well at least it works for me).
Whenever you click the "add pin" icon and the window comes up with all your file names, once you click on the file name you want and it pops up in the window, click behind the file name and manually add the extention type. For instance if your image is named snow and it's a jpeg, type in .jpg behind "snow" (your file name) before you click the "Open" butten to upload it to Pinterest.
It took me forever to figure this one out but at least now it's working. I would love to hear if this worked for you and I hope I explained it clear enough. :)