User-agent: MSIECrawler
Disallow: /trackback.php
Disallow: /xmlrpc.php
Disallow: /stats.php

User-agent: Slurp
Disallow: /trackback.php
Disallow: /xmlrpc.php
Disallow: /stats.php

User-agent: Googlebot
Disallow: /trackback.php
Disallow: /xmlrpc.php
Disallow: /stats.php

User-agent: msnbot
Disallow: /trackback.php
Disallow: /xmlrpc.php
Disallow: /stats.php