> Immediately upon starting the server I get an "incomplete startup > packet" log message. Just prior there is an "autovacuum launcher > started" message.
2012-01-23 10:42:55.245 UTC 11545 LOG: database system is ready to accept connections 2012-01-23 10:42:55.245 UTC 11549 LOG: autovacuum launcher started 2012-01-23 10:42:55.268 UTC 11551 [unknown] [unknown] LOG: incomplete startup packet
I think it's harmless, it's been there for years. It might be related to the init script that starts the database server.