I've lately learned that a website using XML-RPC to show a listing of latest wordpress posts has eliminate. Upon digging in to the XML-RPC respsone, I observe that the final tag is cut down:

  </params>
  </methodRespons

I'd a fast Google, and observed that another person were built with a similar problem, however the ticket was closed because it wasn't considered a Wordpress problem: http://core.trac.wordpress.org/ticket/6701

So, why my XML is all of a sudden being sent using the BOM? I checked the class-IXR.php file and find out everything looks normal:

    $xml = '<?xml version="1.0"?>'."\n".$xml;
    $length = strlen($xml);
    header('Connection: close');
    header('Content-Length: '.$length);
    header('Content-Type: text/xml;charset=utf-8');
    header('Date: '.date('r'));
    echo $xml;
    exit;

I guess I possibly could hack the file to improve the content-length as a fast fix, but wondering why it has all of a sudden began happening.