Ticket #18044: wp-3.2-off-by-1-demo.php

<?php
/**
Plugin Name: Demonstration of off by 1 error in WordPress 3.2.
Plugin URI: 
Description: This plugin demonstrates a possible regression in WordPress 3.2 where the 'delete_post' hook is passed the wrong value for its $postid parameter.
Author: Meitar Moscovitz
Author URI: http://maymay.net/
*/

function notePostID ($postid) {
    ob_start();
    echo 'The $postid passed in is: ';
    var_dump($postid);
    echo '. However, the value of $_GET[\'post\'] was: ';
    var_dump($_GET['post']);
    $out = ob_get_contents();
    ob_end_clean();
    var_dump(htmlentities($out, ENT_QUOTES, 'UTF-8'));
    exit();
}

add_action( 'delete_post', 'notePostID' );
?>