I’m having that problem right now.
My mootools effect works without error on a static version and not at all on the wordpress version even though I have enqueued the scripts correctly and am not running any other scripts. It doesn’t even render any errors. i am at a loss!
<?php wp_enqueue_script('mootools', get_bloginfo('template_directory') .'/js/mootools/mootools.js' , 'false' , '1.2.0'); ?>
<?php wp_enqueue_script('filterExpand' , get_bloginfo('template_directory') .'/js/mootools/filterExpand.js' , array( 'mootools' ) , '1.2.0'); ?>
<?php wp_head(); ?>