You disable jquery when you have two or more references because that causes problems, but you must leave at least one that should be with first of modules that requires jQuery.
Good practice is to disable JQuery in all modules and then in index.php of template in head section add manually reference to latest version of jQuery you can download from jquery.com.
there are 2 script and one css reference:
<link href="<???path???>/jquery-ui-1.8.11.custom.css" rel="stylesheet" type="text/css" />
<script src="<???path???>/jquery-1.5.1.min.js" type="text/javascript" />
<script src="<???path???>/jquery-ui-1.8.11.min.js" type="text/javascript"/>
