alexismarin on "[Plugin: Contact Form 7] Message is sent, but arrows continue to spin endlessly"

Wordpress version 3.5.1
Plugin version 3.5.2
Using a customized version of Responsive theme version 1.9.3.5

I've tried commenting out

if (! $.isPlainObject(data) || $.isEmptyObject(data))
    return;

in scripts.js

and added

<script type='text/javascript' src='http://code.jquery.com/jquery-latest.pack.js'></script>

to page.php above the footer call.

Deactivated all plugins except for Contact Form 7 and Easy WP SMTP (required for the form to send). Also switched to stock twenty twelve theme. I'm still getting the permanent spinner even though the comment sends.

Any other suggestions? Thanks.

http://wordpress.org/extend/plugins/contact-form-7/