@pablomme: If synchronisation were set up via symlinks, this should solve the issue of Ubuntu One not being able to process directories, as a symlink can target either a file, directory, or another symlink (or a hard link for that matter). So you are prbably right: its perhaps not strictly a duplicate, but its closely related in that fixing one, fixes the other (this bug).
@pablomme: If synchronisation were set up via symlinks, this should solve the issue of Ubuntu One not being able to process directories, as a symlink can target either a file, directory, or another symlink (or a hard link for that matter). So you are prbably right: its perhaps not strictly a duplicate, but its closely related in that fixing one, fixes the other (this bug).