Slider does not hide swf in FireFox 2 for Windows

[guille]

When a swf(injected by swf-object) is in an html element that is slided with Fx.Slider the swf is not hidden on Windows with Firefox 2.

I used this workaround(while the style "hidden" is set on another part of the code:

this.sliderFx = new Fx.Slide(this.player, {
    onComplete:function() {
        if (this.player.hasClass('hidden')) {
            this.player.setStyle('visibility','hidden');
        } else {
            this.player.setStyle('visibility','visible');
        }
    }.bind(this)
});

the visibility could be set automatically from Fx.Slider. My workaround is not the best of course. The "visible" property of visibility should be set onStart.