main.log file not being updated - Mailing list pgsql-general

my postgresql-9.0-main.log log file is 0 bytes.  Postgres user has perms to write to it.  And and postgresql.conf file shows to log, but it's not.  Not sure why.

I have the defaults set in except for these changes:

log_connections = on

log_disconnections = on

log_duration = off

log_line_prefix = '%t %p %h %d ' 

log_lock_waits = on 

log_statement = 'none'

any ideas?  I used to write log entries, but now, not so much.

Thanks.