looks like your theme is doing bad things… it appears to be loading its own copy of jquery – and a very, very old version of it too… its doing this:
<script type=”text/javascript” src=”http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js”></script>
instead of loading the wp version… and its doing it outside of the wp api, so the wp version of jquery is also loaded and so they conflict…
more reading: http://codex.simple-press.com/codex/faq/troubleshooting/what-is-this-jquery-conflict/
its loading version 1.4.2 release a very long time ago… the latest version shipping with wp 3.6 is 1.10.1 (in beta currently)… so you can see how there would be problems…
a quick switch to the default wp theme should verify this as things should work…
if you can find where in your theme its incorrectly loading this ancient version of jquery , we can help correct it…