Hi everyone - this is more of an FYI than a support question for the forum - but it appears that if you try to upload a photo from Dropbox that is marked as an 'online-only' file within Dropbox (i.e. it is not actually stored on your local computer but it is in one of your Dropbox folders), the forum will complain that it is an empty file and can't upload it. Which is technically correct, and the way to solve it is to open the file locally, which forces Dropbox to download it. Then when you try to upload it should work. At least this is what I encountered with my avatar picture. YMMV.