In the ePUB version you have this:
Code:
<?xml version='1.0' encoding='utf-8'?>
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>
<meta content="text/html; charset=ISO-8859-1" http-equiv="content-type"/>
which is declaring both encodings utf-8 and ISO-8859-1, I don't think that's right.