Have you notice, that event in the latest stable version of prestashop (v 1.3.1), there still a bug that related to mail alert module.

I noticed this when i try to input my email address at our latest client online store for the product that is out of stock. The Notify me when available text link, when you try to click it, it won’t bring you anywhere, because there is a bug in the product.tpl file inside the mail alert module.