http://forum.dokuwiki.org/thread/2894
Starting with version 10,0,2, if Flash Player sees a "Content-Disposition: attachment" header while downloading a SWF file, it will ignore the SWF file rather than play it. Note that this restriction applies only to SWF files and not to other types of content, such as images, sounds, text, or XML files, policy files, etc.
Solution: change fetch.php to something like this:
//application mime type is downloadable
if (substr($mime,12,17) != 'x-shockwave-flash') {
if(substr($mime,0,11) == 'application'){
header('Content-Disposition: attachment; filename="'.basename($file).'";');
}
}
Now the movies play with flash player 10,but maybe someone with a deeper understanding of header configs can improve this...