Too much logging

Hi all -

I've noticed my log files for Postgres are getting way too big, since
every single SQL statement being run ends up in the log. However,
nothing I change in postgresql.conf seems to make a bit of
difference.. I've tried restarting postgres, deleting all the
existing logs, etc. No matter what I do, every statement is logged.

What I want is to only log SQL statements that result in errors.
Here's my config options:

log_destination = 'stderr'
logging_collector = on
client_min_messages = error
log_min_messages = error
log_error_verbosity = default
log_min_error_statement = error
log_min_duration_statement = 3000
log_statement = 'all'

Pretty much everything else log related is commented out.. What am I
doing wrong? Thanks!

Mike