Symptoms
Specific jQuery solution not working correctly.
Diagnoses
The code had a jQuery selector that was targeting the 'title' property of the button (which as of the latest SmartForms I don't believe is set).
Resolution
Set the 'name' property of the button to a unique name and altered the selector to target the 'name' property instead of 'title'.
The final expression (to put on a literal data label on the form) was as follows:
<script type="text/javascript">$(document).ready(function() { $("[name='buttonName']").click(function() { window.history.back(); });});</script>