Since the latest update (Ubuntu One Files; Version 1.0.4) the android app does not start anymore sucessfully. After launching an error occured: "Time check error" - "Failed to adjust time. Is your device time set correctly?". Of course, all time related settings are correct. The only option I have, is to select cancel and abort the app-launch. So, I think it is a bug in the latest version.
Does anyone know a workaround?