the problem was caused by the left quotes used in the content, for example:
"London’s"
I corrected the problem by changing the character set used by the connection and the update page.
in the connections/tt_conn.php page, i added the following code:
mysql_set_charset('utf8',$tt_conn);
on the update page, i changed the charset meta tag to use the utf8 character set:
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">


