Hello world example:
http://dev.sencha.com/deploy/ext-3.4...dow/hello.html


after you drag the window to somewhere, it will stuck there.

anther example:

<html>
<head>
<link rel="stylesheet" type="text/css" href="resources/css/ext-all.css" />
<script type="text/javascript" src="adapter/ext/ext-base.js"></script>
<script type="text/javascript" src="ext-all.js"></script>
<script>
Ext.onReady(function(){
a=new Ext.Window({title:"test"})
a.show()
//a.render(document.body);
})
</script>
</head>
<body>
</body>
</html>

drag the window out of screen(scroll bar shows up), the window will be stuck.

I dont know if 3.4.1 fix this.