When embedding an attached .swf file into a page, the resulting page only displays a blank square for Internet Explorer 7.0.6000.16757 under Windows Vista Enterprise. See attached screen shot.

This does not happen with other Flash 10 files loaded from static pages.

This happens whether or not you add your Confluence install to the list of trusted sites.

If you right click on the area where the movie should be displayed, you can see that flash itself is loading, but it displays the text "Movie not loaded...".