[syslog-ng] log statistics messages

Hello, I've successfully replaced syslog on a Fedora5 box with syslog-ng 2.0rc1. My "newbie" concern is about the file /var/log/messages filling up with log statistics messages (every ten minutes) like these: Log statistics; processed='source(s_local)=19', processed='source(s_remote)=0', processed='destination(dsl_console)=0', processed='destination(dsl_maillog)=0', processed='destination(ds_emerg)=0', processed='destination(ds_alert)=0', processed='destination(df_uucp)=0', processed='destination(ds_err)=0', processed='destination(dfs_err)=0', processed='destination(dsl_messages)=16', processed='destination(dfs_crit)=0', How can I avoid such records to be recorded? Thanks Maurizio