Attempt to assign property of non-object

While following the directions on page:

http://drupal.org/node/625792

Attempting to submit from Create content > Facebook Application, I get the following error showing up 4 times:

Attempt to assign property of non-object in /home/drupal_owner/drupal-6.14/sites/all/modules/fb/fb_app.module on line 420.

The app is not created.

Line 420 is the assignment in:

/**
* Convenience method for other modules to attach data to the fb_app object.
*/
function fb_app_get_data(&$fb_app) {
if (!isset($fb_app->fb_app_data)) {
$fb_app->fb_app_data = isset($fb_app->data) ? unserialize($fb_app->data) : array();
}
return $fb_app->fb_app_data;
}