I have a basic html page

Code HTML4Strict:
<!DOCTYPE html>
<html lang="en">
<head>
	<title>Document</title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <script src="http://code.jquery.com/jquery-1.6.2.min.js"></script>
 
    <script>
        $("document").ready(function() {
            $("p").css("border", "3px solid red"); 
        });
    </script>
 
    <style>
        .a { color: Navy; }
        .b { color: Maroon; }    
    </style>
</head>
<body>
 
	<ul id="list1">
		<li class="a">item 1</li>
		<li class="a">item 2</li>
		<li class="b">item 3</li>
		<li class="b">item 4</li>
	</ul>
    <p class="a">This is paragraph 1</p>
    <p>This is paragraph 2</p>
    <p class="b">This is paragraph 3</p>
    <p>This is paragraph 4</p>
 
</body>
</html>

I'm downloading jQuery and specifying it using the src attribute on the scropt tag from http://code.jquery.com/jquery-1.6.2.min.js and i'm getting that error.

I've tried downloading jQuery and saving it locally and that works. However if i use the CDN it's giving me that error on firebug. I have no idea why..

Here's a screenshot

Thanks in advance