$output = <<<EOHTML
<script type="text/javascript" charset="utf-8">
/* <![CDATA[ */
jQuery(document).ready(function($) {
$("a[rel^='{$wppp_rel}']").prettyPhoto({
animationSpeed: '{$wppp_speed}',
padding: {$wppp_padding},
/*opacity: {$wppp_opacity},*/
As you see, I have to disable the opacity value because of $wppp_opacity returns "0,35" which leads to an javascript exception (object initialization error).
This happens in the german version and may have its origin in the different locale.