Above you'll see a sIFR element which needs to be activated. The element is created in an onload event, defined in this page, which includes the full embed HTML.
The sIFR element above this text does not need to be activated. The origin of the replacement has an affect on the activation.
This is expected behavior. Please see http://msdn.microsoft.com/workshop/author/dhtml/overview/activating_activex.asp#loading.