Has anybody experienced issues with shorcode content not parsing in to the function ?

I've this html in to the wordpress editor:

[scroller w="600" type="full-horizontal"]
<img src="http://localhost/wpmu/wp-content/themes/royale/defaultimages/slide21.jpg" alt="" /> <img src="http://localhost/wpmu/wp-content/themes/royale/defaultimages/slide21.jpg" alt="" /> <img src="http://localhost/wpmu/wp-content/themes/royale/defaultimages/slide21.jpg" alt="" />
[/scroller]

this php for that shortcode code

    function show_shortcode($atts, $content=null){
        $fout='';
        $w=940;
        $h=200;
        $type = 'simple';
        if(isset ($atts['type']))
            $type = $atts['type'];
        if(isset ($atts['w']))
            $w = $atts['w'];
        if(isset ($atts['h']))
            $h = $atts['h'];

        if($type=='full-horizontal'){
        $fout.='<div id="scroller'.$this->indexnr.'" class="scroller-con" style="width: '.$w.'px; height: '.$h.'px;">
            <div class="inner" style="width:10000px; height:'.$h.'px;">
            <span class="real-inner">';
        $fout.=$content;
        $fout.='</span></div></div>
            ';
        $fout.='<script>
            jQuery("#scroller'.$this->indexnr.'").scroller();
        </script>';
        }
        $this->indexnr++;
        return $fout;
    }

which is what's outputed

<div id="scroller0" class="scroller-con" style="width: 600px; height: 200px;"> 
            <div class="inner" style="width:10000px; height:200px;"> 
            <span class="real-inner"></span></div></div> 
            <script> 
            jQuery("#scroller0").scroller();
        </script>
<img src="http://localhost/wpmu/wp-content/themes/royale/defaultimages/slide21.jpg" alt="" /> <img src="http://localhost/wpmu/wp-content/themes/royale/defaultimages/slide21.jpg" alt="" /> <img src="http://localhost/wpmu/wp-content/themes/royale/defaultimages/slide21.jpg" alt="" />[/scroller] 

so as you can tell submissions are parsed as null despite the fact that I've content within the shortcode. Also I would include that other shortcode works ( for instance layout ones )

Also, it really works for me personally on MAMP and also the problem only seems online on my small wordpress network installation.

Thanks!