diff --git a/src/www/interfaces.php b/src/www/interfaces.php
index 1702e1755..fec555525 100644
--- a/src/www/interfaces.php
+++ b/src/www/interfaces.php
@@ -1400,7 +1400,7 @@ include("head.inc");
             type: 'post',
             data: 'isAjax=true&ipprotocol=inet' + defaultgw + '&interface=' + escape(iface) + '&name=' + escape(name) + '&descr=' + escape(descr) + '&gateway=' + escape(gatewayip),
             error: function(request, textStatus, errorThrown){
-                if (textStatus === "error" && request.getResponseHeader("Content-Type") === "text/plain") {
+                if (textStatus === "error" && request.getResponseHeader("Content-Type").indexOf("text/plain") === 0) {
                     alert(request.responseText);
                 } else {
                     alert("Sorry, we could not create your IPv4 gateway at this time.");
@@ -1433,7 +1433,7 @@ include("head.inc");
             type: 'post',
             data: 'isAjax=true&ipprotocol=inet6' + defaultgw + '&interface=' + escape(iface) + '&name=' + escape(name) + '&descr=' + escape(descr) + '&gateway=' + escape(gatewayip),
             error: function(request, textStatus, errorThrown){
-                if (textStatus === "error" && request.getResponseHeader("Content-Type") === "text/plain") {
+                if (textStatus === "error" && request.getResponseHeader("Content-Type").indexOf("text/plain") === 0) {
                     alert(request.responseText);
                 } else {
                     alert("Sorry, we could not create your IPv6 gateway at this time.");
diff --git a/src/www/system_gateways_edit.php b/src/www/system_gateways_edit.php
index d3306f92d..95ce65b38 100644
--- a/src/www/system_gateways_edit.php
+++ b/src/www/system_gateways_edit.php
@@ -437,9 +437,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
         if (!empty($_REQUEST['isAjax'])) {
             header("HTTP/1.0 500 Internal Server Error");
             header("Content-type: text/plain");
-            foreach ($input_errors as $error) {
-                echo("$error\n");
-            }
+            echo implode("\n\n", $input_errors);
             exit;
         }