A new frustration, started recently. When I move or copy any Dropbox file, of any type, to another folder - even another Dropbox folder - I now get the daft message shown below. (Tried to embed image but gave up and used link.)
These are local files, made by me, owned by me. Only happens when the start folder is in Dropbox. I can move or copy files outside Dropbox into a Dropbox folder (or any other folder) as usual, with no silly message.
I've also posted to the Dropbox forum but from experience I'm not optimistic.