Comment 16 for bug 666608

I've confirmed that commenting out the suspect lines, and then restarting the ubuntuone syncdaemon (or log-out then log-in since it auto-starts on log-in) provides a work-around for the issue/

I edited the /usr/share/pyshared/ubuntuone/syncdaemon/config.py file using a text editor to have:

        # cleanup empty sections
        #for section in [MAIN, THROTTLING]:
        # if self.has_section(section) and not self.options(section):
        # self.remove_section(section)

saved the file and restarted the syncdaemon.

Since then, running ubuntuone-preferences doesn't cause the syncdaemon.conf file to lose the __main__ section, and syncing works again in the background for my account files.