pdf renders garbled png image

Sure, here’s the sample html I’m using (just using wikipedia’s png logo to test):

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Test</title>
</head>
<body>
<img src="http://upload.wikimedia.org/wikipedia/commons/6/63/Wikipedia-logo.png" />
</body>
</html>

And I’ve attached the pdf output.