Suggestion to strip tags when creating PDF for export (PrintanswersController.php):

                if (substr($sFieldname,0,4) == 'gid_')
                {
                    $oPDF->addGidAnswer(strip_tags($fname[0]));
                }
                elseif ($sFieldname=='submitdate')
                {
                    if($sAnonymized != 'Y')
                    {
                        $oPDF->addAnswer(strip_tags($fname[0])." ".strip_tags($fname[1]), strip_tags($fname[2]));
                    }
                }
                elseif (substr($sFieldname,0,4) != 'qid_') // Question text is already in subquestion text, skipping it
                {
                    $oPDF->addAnswer(strip_tags($fname[0])." ".strip_tags($fname[1]), strip_tags($fname[2]));
                }