Not sure if this is true of the 188.8.131.52.b release of mojoPortal or not, but certainly with the latest svn of mojoportal you can control which version is loaded from web.config/user.config
<add key="GoogleCDNYUIVersion" value="2.6.0" />
<add key="GoogleCDNjQueryVersion" value="1.3.2" />
<add key="GoogleCDNjQueryUIVersion" value="1.7.1" />
I generally keep these defaults updated in Web.config as I hear about new releases of those js libraries, but it allows site owners to override it in case they have custom features which require a specific version.