Seeing "fetch 500 from LOG" almost continuously in my PG logs for a new Slony 2.0.7 install.  The previous version (2.0.3?) didn't show these messages in the PG log.  Researching the issue, historically, this message was usually accompanied by a performance issue.  This isn't the case with my databases though, they appear to be running just as well as ever and the lag between replicated nodes appears to be about the same as the previous version.

I guess my question is what does this message mean in this version of Slony?  Is it an indication of sub-optimal slon parameters?
slon -g 20 $SLON_CLUSTER "host=$HOSTNAME port=$PORT dbname=$DB user=$USER"

And how can I get rid of it if it's not an issue?    

Mike