The problem is with the calls to imap_utf8 in class.pop3.php which makes everything uppercase. The solution is to use imap_mime_header_decode() which works better. Here are the changes to class.pop3.php's createTicket function. Email or PM me if you need a hand:
function createTicket($mid,$emailid=0){
global $cfg;
$mailinfo=$this->getHeaderInfo($mid);
$name = imap_mime_header_decode( $mailinfo );
$name = $name->text;
$subject = $mailinfo?$mailinfo:'';
if( is_array( $subject ) ) {
$subject = $subject->text;
}
$var=$name;
$var=$mailinfo;
$var=$subject;