Atropos error on WP 2.9.2

When I edit pages, a error occur

Erro de banco de dados do WordPress Query was empty para a consulta feita por edit_post, wp_update_post, wp_insert_post, do_action, call_user_func_array, atropos_save_expiration_date, atropos_set_value

http://wordpress.org/extend/plugins/atropos/