I had a similar problem. I installed rsyslog, and it worked until the cron daily rotated. The trouble was a stray file: /etc/logrotate.d/inetutils-syslogd
which I purged. So try grepping logrotate.d for /var/log/syslog. A duplicate entry could be shadowing rsyslog. I had an email from cron that clued me in: /etc/cron.daily/logrotate: error: rsyslog:1 duplicate log entry for /var/log/syslog -- Anthony Carrico
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