After running W3 Markup Validator on a site of mine, I received the following error:
Line 219, Column 57: element "footer" undefined
<footer id="footer" class="region region-footer">
Whether or not this is actually an issue, bad style, or what, I've decided that I don't want Drupal using the HTML footer tag. Is there a way that I can change this and have it just create yet another div?