Invalid HTML script injection by Visualforce

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
        <title>Invalid HTML script injection by Visualforce</title>
    </head>
    <body>
        <p>Copy and paste this code into the official W3C Markup Validation Service:
        http://validator.w3.org/#validate_by_input+with_options</p>
    </body>
</html>
<script type="text/javascript">
    // This is effectively where Salesforce is adding a script element
    // automatically, with no way for the developer to intervene or
    // correctly place the script element to conform with HTML standards
</script>