Actions error with Postgres 8.3.1 (Cast problem?!)

when creating an action it gave me this error:

warning: pg_query() [function.pg-query]: Query failed: ERROR: operator does not exist: character varying = integer at character 33 HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts. in /var/www/drupal-prod/includes/database.pgsql.inc on line 141.
user

warning: ERROR: operator does not exist: character varying = integer at character 33 HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts. query: SELECT * FROM actions WHERE aid = 1 in /var/www/drupal-prod/includes/actions.inc on line 353.

warning: pg_query() [function.pg-query]: Query failed: ERROR: operator does not exist: character varying = integer at character 33 HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts. in /var/www/drupal-prod/includes/database.pgsql.inc on line 141.
user

warning: ERROR: operator does not exist: character varying = integer at character 33 HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts. query: SELECT * FROM actions WHERE aid = 0 in /var/www/drupal-prod/includes/actions.inc on line 353.

warning: pg_query() [function.pg-query]: Query failed: ERROR: operator does not exist: character varying = integer at character 31 HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts. in /var/www/drupal-prod/includes/database.pgsql.inc on line 141.
user

warning: ERROR: operator does not exist: character varying = integer at character 31 HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts. query: DELETE FROM actions WHERE aid = 0 in /var/www/drupal-prod/includes/actions.inc on line 363.

if I tryed to deleted, more errors, now I have an action that I can't delete.

(I think is a similar problem than http://drupal.org/node/252921)