603423-1.html
<!DOCTYPE HTML>
<html>
<head>
<title>Testcase for bug 603423</title>
</head>
<body><p><iframe src="data:text/html;charset=x-mac-arabic,Hello World"</iframe></p></body>
</html>
<!DOCTYPE HTML>
<html>
<head>
<title>Testcase for bug 603423</title>
</head>
<body><p><iframe src="data:text/html;charset=x-mac-arabic,Hello World"</iframe></p></body>
</html>