Attached are updates to 2 of the gallery mootools files, please them in the PowerGallery/js/ folder.
in the galleries/ribon_fulsize/index.php file, change:
<script type="text/javascript" src="<?php echo $pg_config['path']; ?>js/mootools-core.js"></script>
<script type="text/javascript" src="<?php echo $pg_config['path']; ?>js/mootools-more.js"></script>
to point to the new updated files::
<script type="text/javascript" src="<?php echo $pg_config['path']; ?>js/mootools-core-1.3.2-full-compat-yc.js"></script>
<script type="text/javascript" src="<?php echo $pg_config['path']; ?>js/mootools-more-1.3.2.1_min.js"></script>