Yay for intelligent error messages:

HTTP/1.0 306 Grow up
Server: icecast/1.3.11-debian
Connection: close
Content-Type: text/html

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
  <head>
    <title>306 Request all messed up</title>
  </head>

  <body>
    <h1>306 Request all messed up</h1>
    The request your application sent to the server makes
    no more sense than... well.. women with clothes on :)<br>
    <hr>
  </body>
</html>