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I use Dreamweaver, and the simple fix is to download the 8.0.2 upgrade. Otherwise you can use something like SWFObject to change the object tags to js.
I did this but still got the security blocker when I tested my page locally. I then spent another couple of hours trawling the forums before I discovered that IE defaults to preventing active content in local files but not in internet files.
I had to "Allow active content to run in files on My Computer" in the Tools-Internet Options-Advanced-Security menu.
Hope this saves some people some time