Here is the code that i pun into my view.html.php
$document =& JFactory::getDocument();
$document->addScriptDeclaration ( 'jQuery.noConflict();');
in the validation.js
I change all the $ to jQuery.
For example i change
$(document) to jQuery(document)
$('#login') to jQuery('#login')
and all others.
Test again and it works. Hope this help.