Gravity Forms + WordpressMU + Domain Mapping = problem

Hoping someone will be able to help with this one. I have Wordpressmu set up using subfolders (www.mysite.com/blog1). I'm using the Domain Mapping plugin to map a domain name to a specific blog. So http://www.somesite.com resolves to http://www.mysite.com/blog1.

Got everything working and ran into a weird snag with Gravity Forms. I have a form that uses date fields amongst others. Posting that form via shortcode on a page, it works perfectly, IF the page is a Main Page. As soon as I make it a sub-page, the form breaks. Tracked it down to the jquery.ui.datepicker being the issue -- jquery seems not to load correctly. If I manually link to jquery in the header template of the site, works fine.

I've gone into form_display.php and fiddled with the enqueue_form_script function on line 506, but no luck.

Any thoughts as to why jQuery wouldn't be loading under that situation?

Here's what I get in the header on the forms page:

<script type='text/javascript' src='http://www.seconddomain.org/wp-includes/js/jquery/jquery.js?ver=1.3.2'></script>

and

<script type='text/javascript' src='http://firstdomain.com/seconddomain/wp-content/plugins/gravityforms/js/conditional_logic.js?ver=1.3.9'></script>

So, the second script -- the one included with Gravity Forms -- is enqueueing correctly. The first one -- to Wordpress's included jquery script -- isn't.

Thanks!