Ext.window.Window on IE8
like the image, What can I do?
Not sure what you're reporting exactly. Are you seeing an issue when displaying an Ext Window on the page in IE8? If so, can you share the version you're using and a test case? Also, do you see the issue with the examples provided with the framework or just your test case?
Looks like the header borders are not rendering correctly which is something that was happening because of the IE8 SSL issue in 4.2. Are you getting a security pompt that says "Do you want to view only the webpage content that was delivered securely?" before the page loads?