Hi,
The first beta of syslog-ng 3.8 was released last week. There are now unofficial packages for the Debian (Ubuntu) / Fedora (RHEL) / (open)SUSE family of Linux distributions. I collected some of the highlights of the new release and also the packaging related changes. You can read it at
https://czanik.blogs.balabit.com/2016/08/syslog-ng-3-8-what-changed/Please test syslog-ng 3.8 and let us know not only your problems but also your success stories!