function refresh() {
	global $db, $api_key, $secret;
	$fb = new FacebookRestClient($api_key, $secret);
	$users = $db->get_results("SELECT * FROM lulzkitteh_users");
	foreach($users as $user) {
		$fb->session_key = $user->session;
		$url = get_image_url();
		$string = "<center><img src='$url' /></center>";
		$fb->profile_setFBML($string);
	}
}