Thank you for your patience. Whilst this is the error one gets for a wrong password, this is not the case here simply changing the status of the user to superuser without touching the password allows the user to login, removing superuser status the reverse. This login error might be caused by the following, or something similar:- "pg_upgrade already starts the postmaster with a -b option that disables non-super-user logins: /* * Binary upgrades only allowed super-user connections */ if (IsBinaryUpgrade && !am_superuser) { ereport(FATAL, (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), errmsg("must be superuser to connect in binary upgrade mode"))); } " taken from http://postgresql.1045698.n5.nabble.com/new-maintenance-db-options-td5714000.html http://postgresql.1045698.n5.nabble.com/new-maintenance-db-options-td5714000.html . This seems to be new in 9.1 . pg_hba.conf is the standard local all postgres peer local all all peer host all all 127.0.0.1/32 md5 host all all ::1/128 md5 Regards -- View this message in context: http://postgresql.1045698.n5.nabble.com/non-superuser-login-phpPgAdmin-PostgreSQL-9-1-tp5723838p5723854.html Sent from the PostgreSQL - admin mailing list archive at Nabble.com. -- Sent via pgsql-admin mailing list (pgsql-admin@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin