This is some good news. Flash cookies have long been the little tracking devil hidden in the details of browsing technology. Now Adobe has announced that that the new Flash Player 10.3 integrates with Internet Explorer's "Delete Browsing History" function and will clear Flash cookies when HTTP cookies are deleted.
...because Flash is an add-on and not part of standard HTML content, browsers have not been able to delete Flash cookies the same way they delete HTTP cookies. When we released IE8, we added APIs (links here and here) for Internet Explorer so that add-ons such as Flash can respond to Delete Browsing History and InPrivate Browsing, allowing consumers to delete Flash cookies along with other data in browsing history.
Adobe recently announced that Flash Player 10.3 integrates with Delete Browsing History. This means that when you delete your cookies with Delete Browsing History, Flash Player will automatically clear your Flash cookies as well.
Some good news yeah, but not practical for me. I need my HTTP cookies to make my browsing easier, with an occasional manual clean-out. Flash cookies need their own easy delete option or add-on in IE, currently you have to visit Macromedia link below afaik.