[syslog-ng] Multi-line support issue

We have tomcat shop and at everyone know tomcat has a java call trace in logs with tab space but syslog-ng doesn't know about it and printing lines as a new line. I have read here syslog-ng 3.x does support multi-line logs http://www.balabit.com/sites/default/files/documents/syslog-ng-pe-4.0-guides... But does this feature available in Open Source syslog-ng? If yes then why its not working for me?