Following up on my previous message, you might want to ensure that the page that has the form (if it's a form) that sends the data for storage is also on a page with:
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
The link you provided has it (and it also has the right Content-Type in the response headers). If it's not stored from a form (e.g. some offline process inserting data), then see previous message.
