I encounter a problem mentioned before (Dropbox making duplicate files): "My Dropbox keeps making duplicate copies of files, e.g. Becker Job and saving it as Becker Job(1). What is causing this and how do I stop it?"
The answer to this was that it probably had to do with shared folders. However, I get duplicates in folders I do not share with other people. The events log also states that I have made the changes (i.e., created the duplicates).
I use Dropbox in multiple places and across platforms, as intended. For clarity: I use it on a PC (Windows 7) at work, PC (Windows 7) at home, a tablet (Android), and my iPhone (iOS 7). Could this cross-platform usage be the problem?