The default jQuery url (in Host settings) is somthing like


http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js


The problem with this is that the version of jQuery you will get is the *latest* release of version 1.  So what your site runs with, will change every time Google puts up a new release.  It also means that Google serves the script with NO cache control header so that the user's browser is forced to re-download the script on *every* page request.

If you change it to (say)

http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js

Then you will *always* get the version 1.6.2 - presumably the one you actually tested with - *AND* it will be served with cache control headers so that your user's browser never requests it again after the first time.

If you change it to

//ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js

Then you will get the 'right' protocol for the page. Http or https - however the enclosing page was requested.  Your site will automatically request the https version for it's secure pages and the http version for the non-secure pages.  You user does NOT see the "Do you want to download non-secure bits as well?" dialog box.

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Best wishes,
- Richard
Agile Development Consultant, Practitioner, and Trainer
www.dynamisys.co.uk