--- a/feedback.php
+++ b/feedback.php
@@ -1,5 +1,6 @@
 <?php
 include ("include/common.inc.php");
+ $GTFSREnabled = false;
 include_header("Feedback", "feedback");
 function sendEmail($topic, $message)
 {
@@ -26,11 +27,11 @@
 }
 if (isset($_REQUEST['feedback']) || isset($_REQUEST['newlocation'])){
 	sendEmail("bus.lambda feedback",print_r($_REQUEST,true));
-	echo "<center><h2>Thank you for your feedback!</h2></center>";
+	echo "<h2 style='text-align: center;'>Thank you for your feedback!</h2>";
 } else {
 $stopid = "";
 $stopcode = "";
-$urlparts = explode("?",$_SERVER["HTTP_REFERER"]);
+if (isset($_SERVER["HTTP_REFERER"])) $urlparts = explode("?",$_SERVER["HTTP_REFERER"]);
 if (isset($urlparts[1])) {
     $getparams = explode("&",$urlparts[1]);
     foreach ($getparams as $param) {
@@ -59,7 +60,7 @@
 </textarea>
 <textarea name="extrainfo" id="extrainfo">
 <?php
-  echo "Referrer URL: ".$_SERVER["HTTP_REFERER"];
+  echo "Referrer URL: ".($_SERVER["HTTP_REFERER"] ? $_SERVER["HTTP_REFERER"] : "");
   echo "\nCurrent page URL: ".curPageURL();
   echo "\nUser Agent: ".$_SERVER["HTTP_USER_AGENT"];
   echo "\nUser host/IP: ".$_SERVER["HTTP_X_FORWARDED_FOR"]." ".$_SERVER["REMOTE_ADDR"];