Just installed ads and am trying to save one with an expiration date of 2014-09-29 00:00 and I get this error

PDOException: SQLSTATE[22007]: Invalid datetime format: 1366 Incorrect integer value: '' for column 'autoexpire' at row 1: INSERT INTO {ads} (aid, uid, adstatus, adtype, redirect, autoactivate, autoexpire, activated, maxviews, maxclicks) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7, :db_insert_placeholder_8, :db_insert_placeholder_9); Array ( [:db_insert_placeholder_0] => 40866 [:db_insert_placeholder_1] => 1 [:db_insert_placeholder_2] => active [:db_insert_placeholder_3] => html [:db_insert_placeholder_4] => http://usafld7prod.localdomain/ad/redirect/40866 [:db_insert_placeholder_5] => 0 [:db_insert_placeholder_6] => [:db_insert_placeholder_7] => 1406850517 [:db_insert_placeholder_8] => 0 [:db_insert_placeholder_9] => 0 ) in ad_nodeapi() (line 1055 of /home/kjh/usafld7prod/sites/all/modules/ad/ad.module).

In ad_node_insert() the autoexpire has the value '2014-09-29 00:00'.

I'm not sure how that is supposed to save into an int(11) column in the database. In ad.install its configured as
'autoexpire' => array(
'type' => 'int',
'not null' => TRUE,
'unsigned' => TRUE,
'default' => 0,
'description' => 'Is ad autoexpiring?',
),