Instead of using script tags, try the wordpress php methods for calling jQuery:
<?php
wp_register_style('validation-css',
get_template_directory_uri() . "/css/validationEngine.jquery.css",
false);
wp_enqueue_style('validation-css');
//do the same for that form stylesheet with the formular class if you need it
/*******
// Only include this commented section if you really need
// that specific version of jQuery for validationEngine to work. Otherwise leave it out
wp_deregister_script('jQuery');
wp_register_script('jquery',
get_template_directory_uri() . "/js/jquery-1.8.2.min.js", false);
*****/
wp_enqueue_script('jQuery');
wp_register_script('validation',
get_template_directory_uri() . "/js/jquery.validationEngine.js",
array('jquery'));
wp_enqueue_script('validation');
wp_register_script('validation-language',
get_template_directory_uri() . "/js/jquery.validationEngine-en.js",
array('jQuery')); //not sure about that last param, also try using array('validation') ?
wp_enqueue_script('validation-language');
?>