when create folders or files with specials chars like accents or "ñ , ç.." , dropbox duplicates the folder with weird chars (the folder is well created, just creates another one with replaced specials chars with weird chars). This doesn't happen everytime, seems random...
It happened with or app "avant manager", but our clients claims, that is happening too with "synology cloud sync", and "western digital app for dropbox".
So it doesnt seems a problem of encoding when posting to api, because as i said, folders and files are well created. Just later some process duplicates it... under unknown circunstances...