additional:
Every thumbsgally looks fine. When i klick next (right arrow) in the last picture. I switch to an other thumbs gallery. The are connect with each other.

regards

Hi Marvin

To resolve try replacing the contents of your thumbgallerys default.php (../modules/mod_j51thumbsgallery/tmpl/default.php) with the following...

<?php

/**

* @title	    J51 Thumbs Gallery

* @version		1.0

* @website		http://www.joomla51.com

* @copyright	Copyright (C) 2012 Joomla51.com. All rights reserved.

* @license		GNU/GPL, see LICENSE.php

*/

// no direct access

defined('_JEXEC') or die('Restricted access');

$document 			= JFactory::getDocument();

$baseurl    		= JURI::base();

$fade_opacity		= $params->get('fade_opacity');

$bordersize			= $params->get('bordersize');		

$bordercolor		= $params->get('bordercolor');

$outlinecolor		= $params->get('outlinecolor');

$width				= $params->get('thumbwidth');

$height				= $params->get('thumbheight');

$margin				= $params->get('margin');

$show_jquery	    = $params->get('show_jquery');

$document->addCustomTag("<script src='".$baseurl."modules/mod_j51thumbsgallery/js/jquery.noconflict.js' type='text/javascript'></script>");

$document->addCustomTag("<script src='".$baseurl."modules/mod_j51thumbsgallery/js/script.js' type='text/javascript'></script>");

$document->addCustomTag("<script src='".$baseurl."modules/mod_j51thumbsgallery/js/jquery.fancybox.js' type='text/javascript'></script>");

$document->addStyleSheet('modules/mod_j51thumbsgallery/css/thumbs_style.css');

$list = GalleryHelper::getimgList($params);

$j51_moduleid       = $module->id

?>

<div class="j51thumbs<?php echo $j51_moduleid; ?>" style="margin-left:-<?php echo $margin;?>px;">

<div class="j51thumbs">

<div class="gallery">

<?php foreach($list as $item) { ?>	

		<a class="j51Box fancybox<?php echo $j51_moduleid; ?>" style="margin:<?php echo $margin;?>px;" data-fancybox-group="gallery" href="/<?php echo $item['image'] ?>">

			<img src="/<?php echo $item['thumb'] ?>" 

			style="padding:<?php echo $bordersize;?>px;

			background-color:<?php echo $bordercolor;?>;

			border:1px solid <?php echo $outlinecolor;?>;"

			alt="<?php echo $item['image'] ?>" />

			<i style="left: <?php echo ($bordersize + 1);?>px;

	top: <?php echo  ($bordersize + 1);?>px;

	height: <?php echo $height;?>px;

	width: <?php echo $width;?>px;"></i></a>		

<?php } ?>

</div></div></div> 

<div class="clear"></div> 

<script type="text/javascript">

(function($) {"use strict";

	$(document).ready(function() {

			$('.fancybox<?php echo $j51_moduleid; ?>').fancybox();

	});

})(jQuery);

</script> 

Ciarán

Hi Ciarán

Great job! I can reproduce it. With the new file ist works. Copy back the old file and the issue came back.

Thanks a lot.

regards