fp=Resource id #1 errno=0 errstr= - result from Paypal is: cmd=_notify-validate</pre> </blockquote>  <p>Some possible problems are:</p> <ul> <li><p>Missing or unknown request method.</p></li> <li><p>Missing URL.</p></li> <li><p>Missing HTTP Identifier (HTTP/1.0).</p></li> <li><p>Request is too large.</p></li> <li><p>Content-Length missing for POST or PUT requests.</p></li> <li><p>Illegal character in hostname; underscores are not allowed.</p></li> <li><p>HTTP/1.1 <q>Expect:</q> feature is being asked from an HTTP/1.0 software.</p></li> </ul>  <p>Your cache administrator is <a href="mailto:sysadmin@netregistry.net%W">sysadmin@netregistry.net</a>.</p> <br> </div>  <hr> <div id="footer"> <p>Generated Sun, 05 Feb 2012 00:13:18 GMT by havp.servers.netregistry.net (squid)</p> <!-- ERR_INVALID_REQ --> </div> </body></html>