State not saving using API or Profiles

Using the same code in Drupal, this worked in revision 4495, but not in 4543. The state_province_id field in the civicrm_address table is being marked as null if previously blank or unchanged if it was not null.

Code snippet:

if (function_exists('civicrm_initialize')) {
civicrm_initialize(TRUE);
$params = array('email' => 'rich@strangebirdlabs.com');
if ($contact = crm_get_contact($params))

{ $info = array('first_name' => 'Rich', 'last_name' => 'Orris', 'street_address' => '123 Main Street', 'city' => 'San Francisco', 'state_province' => 'CA', 'postal_code' => '94111', 'phone' => '(555) 555-5555'); $contact = crm_update_contact($contact, $info); }

}