Something else to try might be to add a clearing element before the closing </div> tag of the #content div.
Find the code in your page:
<p>Sara Hester Sevenoaks 01732 460350<br>
Carole Wildman Godalming 01483 427329</p>
</div>
<!-- InstanceEndEditable --> </div>
and try adding:
<br style="clear: both; height: 0pt; font-size: 1px; line-height: 0px;">
just before the closing div tag (just before the '<!-- InstanceEndEditable --> comment):
<p>Sara Hester Sevenoaks 01732 460350<br>
Carole Wildman Godalming 01483 427329</p>
</div><br style="clear: both; height: 0pt; font-size: 1px; line-height: 0px;">
<!-- InstanceEndEditable --> </div>
That should force the 'content' div to fully contain the copyholder div, and present OK whether IE8 is in compatibility view or not. Maybe. It's worth a try.