According to news.com, Microsoft will stop Active-X controls like embeded media or flash to start automatically in the next security upgrade.

This is very bad news for Flash designers (and may give DOM scripting another boost). Microsoft recommends as a workaround to Activate the control dynamically by writing it out via JavaScript. The examples given are rather messy, and I wonder if Bobby van der Sluis’ Unobtrusive Flash Object wouldn’t have been a better example to promote as a fix.