Hey guys, I was having the same problem.
The cause was a conflict between the WordPress jQuery library and the jQuery library (inside vendors.js) I was intending to add to my Theme.
Basically I was inserting two jQuery libraries into the project. That was causing the ajaxComplete() method not to work and subsequently making $.fn.almComplete not to fire.
The solution was preventing the WordPress jQuery libraries to be included into the theme:
// functions.php
if( !is_admin()){
wp_deregister_script('jquery');
wp_register_script('jquery', ("http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"), false, '1.3.2');
wp_enqueue_script('jquery');
}