Opera 9 is loading pages in the demo app with an incomplete screen redraw.

i.e.:
http://extjs.com/deploy/ext-1.0-beta1/docs/
Loads up with the entire right side blue, and not the correct panel content.

This can be fixed by checking for the opera object, and doing a small hack to get it to render. I was told to do this by a member of the Opera team . Where it should fall in the Ext code I don't know, but it should be the last thing to happen in order to get the screen the latest visual intent.

Code:
            if (window.opera) {
                document.body.style += '';
            }