8.3 Logging Question

I'm running PG 8.3rc2 to start testing it out, and really like how it is preforming for me so far.  However, I have one question on the logging.  I am trying to use syslog and csvlog to log all sql.  This seems to work great except that for every log rotation postgres does, I get a .csv log file that grows and a 0 byte .log file.  Since I'm not logging to stderr, why is the .log file being created, and how do I turn that off?

Thanks for your help,

Chris

Relevent config file portion:

#------------------------------------------------------------------------------
# ERROR REPORTING AND LOGGING
#------------------------------------------------------------------------------

# - Where to Log -

log_destination = 'syslog,csvlog'               # Valid values are combinations of
                                        # stderr, csvlog, syslog and eventlog,
                                        # depending on platform.  csvlog
                                        # requires logging_collector to be on.

# This is used when logging to stderr:
logging_collector = on                  # Enable capturing of stderr and csvlog
                                        # into log files. Required to be on for
                                        # csvlogs.
                                        # (change requires restart)

# These are only used if logging_collector is on:
log_directory = 'pg_log'                # directory where log files are written,
                                        # can be absolute or relative to PGDATA
#log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log'        # log file name pattern,
                                        # can include strftime() escapes
log_truncate_on_rotation = on           # If on, an existing log file of the
                                        # same name as the new log file will be
                                        # truncated rather than appended to.
                                        # But such truncation only occurs on
                                        # time-driven rotation, not on restarts
                                        # or size-driven rotation.  Default is
                                        # off, meaning append to existing files
                                        # in all cases.
log_rotation_age = 1h                   # Automatic rotation of logfiles will
                                        # happen after that time.  0 to disable.
log_rotation_size = 0                   # Automatic rotation of logfiles will
                                        # happen after that much log output.
                                        # 0 to disable.

# These are relevant when logging to syslog:
syslog_facility = 'LOCAL0'
syslog_ident = 'postgres'