Grouping error when submitting a forum topic

There seems to be an sql error in Notifications_Event->get_subscriptions() (line 507 of /opt/drupal-7.2-psql/sites/all/modules/contrib/notifications/notifications.event.inc. The client is using latest release of Notifications - alpha2 from Dec, 2011 - with Drupal 7.2 on postgres.:

PDOException: SQLSTATE[42803]: Grouping error: 7 ERROR: column "s.conditions" must appear in the GROUP BY clause or be used in an aggregate function LINE 1: SELECT s.sid AS sid, s.conditions AS conditions ^: SELECT s.sid AS sid, s.conditions AS conditions FROM {notifications_subscription} s LEFT OUTER JOIN {notifications_subscription_fields} f ON s.sid = f.sid WHERE (s.status = :db_condition_placeholder_0) AND (s.send_interval >= :db_condition_placeholder_1) AND(( (s.type = :db_condition_placeholder_2) AND(( (f.type = :db_condition_placeholder_3) AND (f.intval = :db_condition_placeholder_4) )))OR( (s.type = :db_condition_placeholder_5) AND(( (f.type = :db_condition_placeholder_6) AND (f.value = :db_condition_placeholder_7) )))OR( (s.type = :db_condition_placeholder_8) AND(( (f.type = :db_condition_placeholder_9) AND (f.intval IN (:db_condition_placeholder_10)) )))OR( (s.type = :db_condition_placeholder_11) AND(( (f.type = :db_condition_placeholder_12) AND (f.intval IN (:db_condition_placeholder_13)) )))OR( (s.type = :db_condition_placeholder_14) AND(( (f.type = :db_condition_placeholder_15) AND (f.value = :db_condition_placeholder_16) )OR( (f.type = :db_condition_placeholder_17) AND (f.intval IN (:db_condition_placeholder_18)) ))))AND (s.sid > :db_condition_placeholder_19) GROUP BY s.sid HAVING (COUNT(f.sid) = s.conditions) ORDER BY s.sid ASC LIMIT 100 OFFSET 0; Array ( [:db_condition_placeholder_0] => 1 [:db_condition_placeholder_1] => 0 [:db_condition_placeholder_2] => content_thread [:db_condition_placeholder_3] => node:nid [:db_condition_placeholder_4] => 58 [:db_condition_placeholder_5] => content_type [:db_condition_placeholder_6] => node:type [:db_condition_placeholder_7] => forum [:db_condition_placeholder_8] => taxonomy_term [:db_condition_placeholder_9] => term:tid [:db_condition_placeholder_10] => 9 [:db_condition_placeholder_11] => taxonomy_term_multiple [:db_condition_placeholder_12] => term:tid [:db_condition_placeholder_13] => 9 [:db_condition_placeholder_14] => content_type_term [:db_condition_placeholder_15] => node:type [:db_condition_placeholder_16] => forum [:db_condition_placeholder_17] => term:tid [:db_condition_placeholder_18] => 9 [:db_condition_placeholder_19] => 0 ) in Notifications_Event->get_subscriptions() (line 507 of /opt/drupal-7.2-psql/sites/all/modules/contrib/notifications/notifications.event.inc).

It doesn't prevent node from being created but it does prevent the node view after submission.

It may have something to do with how postgresql differs from the mysql standard for GROUP BY and HAVING: http://stackoverflow.com/questions/1769361/postgresql-group-by-different...