Odd behavior of Validation plug-in on my new computer

Odd behavior of Validation plug-in on my new computer

I transferred my localhost development from a WindowsXP PC to a Windows7 PC and everything is now working except for Validation plug-in strangeness.  In the old WindowsXP computer on Firefox 15, Validation works.  In the new Windows7 computer on Firefox 15, the page will not load and I get the Firebug Console message
TypeError: jQuery.validator is undefined
jQuery.validator.addMethod(
On this same Windows7 computer, the page loads and Validation works in Chrome and in IE8, but not in FF15.

I load Validation from a CDN, as follows
<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.9/jquery.validate.min.js"></script>

Has anyone else seen this?  Anyone know where the problem is?  Is it in Validation or FF15?