Fallback flash video player is always loaded in firefox?
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I'm using the video element and implemented it like here:

http://camendesign.com/code/video_for_everybody

So the code looks basicly like this: 

    <video width="640" height="360" poster="poster.jpg" controls="controls" preload="none">
	    <source type="video/mp4" src="mp4video.mp4" />
	    <source type="video/ogg" src="ogvvideo.ogv" />
	    <object id="flowplayer" width="640" height="360" data="someplayer.swf" type="application/x-shockwave-flash">
            <param name="movie" value="someplayer.swf">
            ...
        </object>
    </video>

Now I saw in Firebug's "network" tab that the .swf is loaded always, regardless of it will be used or not. Is there any way to prevent this? Is this a bug or is it supposed to be like this in Firefox? I don't really see, why the fallback player should be downloaded, when it's not going to be used. In my understanding fallback resources should only be loaded, if a fallback solution actually is needed and used. 

In Safari, Chrome and Opera the .swf is not loaded.

Thx for any help.