Why do you have the same url in the src and qtsrc attributes? This
will cause the browser to download the file once, and QuickTime will
download it a second time. Also, "application/x-quicktimeplayer" is a
MIME type that is *never* registered for the plug-in, only for
QuickTime Player. Apparently FireFox is overriding your "type"
attribute and using the url's extensions because an embeded file can
not be handled by an application.
Clearly this shouldn't crash, but remove the qtsrc parameter and
see if it changes the behavior.
