Since losing the patent case filed by Eolas (U.S. Patent No. 5,838,906—known as the ‘906 patent), Microsoft has to change radically the way IE works with a lot of content, especially video and other ActiveX controls.
Microsoft is now making changes for Internet Explorer. The changed IE handles active content, such as QuickTime, Macromedia Flash, Java and other ActiveX controls in a new way. Rather than automatically rendering and displaying active content, the updated browser prompts the user to confirm each active content item on a page. §
Heh! The crazy patent system! :)