diff --git a/common.php b/common.php
index aa1fbd7..833fab7 100644
--- a/common.php
+++ b/common.php
@@ -203,6 +203,45 @@ function gracefuldeath_html($error) {
     echo "ERROR: " . $error;
 }
 
+function gracefuldeath_httpcode($code) {
+    $explanation = "An error has occured on the server and the request could not be processed";
+    if (!isset($code))
+        $code = 404;
+    switch($code) {
+        case 400: 
+            $code = "400 Bad Request";
+            $explanation = "The request was missing a required parameter and could not be processed";
+            break;
+        case 404:
+            $code = "404 Not Found";
+            $explanation = "The requested resource was not found or never existed";
+            break;
+        case 410:
+            $code = "410 Gone";
+            $explanation = "The requested content does not exist, it may have expired, been deleted, or you may have an out-of-date link";
+            break;
+        case 417:
+            $code = "417 Expectation Failed";
+            $explanation = "The user specified in the request was not found or never existed";
+            break;
+    }
+    header($_SERVER["SERVER_PROTOCOL"] . $code);
+    echo "<html><head>";
+    echo "<meta name='viewport' content='width=device-width, initial-scale=1'>";
+    echo "<title>Share Service - Error " . $code . "</title>";
+    echo "<link rel='stylesheet' href='style-columns.css'>";
+    include("web-meta.php");
+    echo "</head>";
+    echo "<body style='margin-left: 20px'><table border=0><tr>";
+    echo "<td><img src='images/icon-128.png'></td>";
+    echo "<td><h1>HTTP error: " . $code . "</h1></td>";
+    echo "</tr></table>";
+    echo "<p>" . $explanation . "<p>";
+    echo "<a href='index.php'>Go Home</a>";
+    echo "</body></html>";
+    die;
+}
+
 function gracefuldeath_later($message) {
     global $error_message;
     $error_message = $message;
diff --git a/download.php b/download.php
index 8010e34..5ad0113 100644
--- a/download.php
+++ b/download.php
@@ -5,7 +5,7 @@ include("common.php");
 
 $sharehandle = $_SERVER['QUERY_STRING'];
 if (!isset($sharehandle) || $sharehandle == "")
-    gracefuldeath_html("content request not specified!");
+    gracefuldeath_httpcode(400);
 
 //handle Facebook
 if (strpos($sharehandle, "&fbclid")) {
@@ -20,17 +20,18 @@ if (count($shareparts) > 1) {
     $contentid = $shareparts[1];
 
     if (!is_dir("data/" . $username)) {
-        gracefuldeath_html("user does not exist!");
+        gracefuldeath_httpcode(417);
     }
 
     //Make sure the file exists and can be loaded
-    $jsondata = get_share_data($username, $config['readonlykey'], 'gracefuldeath_html');
+    $jsondata = get_share_data($username, $config['readonlykey'], 'gracefuldeath_httpcode');
+    $found = false;
     foreach ($jsondata['shares'] as $share => $value) {
         //print_r($value);
         if ($contentid == $value['guid'])
         {
-
-	    $client = strtolower($_SERVER['HTTP_USER_AGENT']);
+            $found = true;
+	        $client = strtolower($_SERVER['HTTP_USER_AGENT']);
             if (strpos($client, "hpwos") || strpos($client, "webos") || strpos($client, "android")) {
                 echo '<img src="i.php?'. $_SERVER['QUERY_STRING'] . '">';
             } else {
@@ -46,8 +47,11 @@ if (count($shareparts) > 1) {
             }
         }
     }
+    if (!$found) {
+        gracefuldeath_httpcode(410);
+    }
 
 } else {
-    gracefuldeath_html("content request malformed!");
+    gracefuldeath_httpcode(400);
 }
 ?>
diff --git a/i.php b/i.php
index cc16fce..ae17e4d 100644
--- a/i.php
+++ b/i.php
@@ -3,7 +3,7 @@
 //      This endpoint supports returning the binary data of an image share that can be the source of an HTML img element
 include("common.php");
 
-if (isset($_GET["size"]))
+if (isset($_GET["size"]))   //TODO: Accepted but not used at this time
     $imgSize = $_GET["size"];
 if (isset($_GET['img']) && $_GET['img'] != "") {
     $sharehandle = $_GET['img'];
@@ -12,8 +12,7 @@ if (isset($_GET['img']) && $_GET['img'] != "") {
         $sharehandle = $_SERVER['QUERY_STRING'];
 }
 if (!isset($sharehandle)) {    //Deal with no usable request
-    header($_SERVER["SERVER_PROTOCOL"] . " 400 Bad Request");
-    die;
+    gracefuldeath_httpcode(400);
 }
 
 $sharehandle = base64url_decode($sharehandle);
@@ -23,22 +22,27 @@ if (count($shareparts) > 1) {
     $contentid = $shareparts[1];
 
     if (!is_dir("data/" . $username)) {
-        gracefuldeath_html("user does not exist!");
+        gracefuldeath_httpcode(417);
     }
 
     //Make sure the file exists and can be loaded
-    $jsondata = get_share_data($username, $config['readonlykey'], 'gracefuldeath_html');
+    $jsondata = get_share_data($username, $config['readonlykey'], 'gracefuldeath_httpcode');
+    $found = false;
     foreach ($jsondata['shares'] as $share => $value) {
         //print_r($value);
         if ($contentid == $value['guid'])
         {
+            $found = true;
             header('Content-Type '. $value['contenttype']);
             $fp = fopen($value['content'], 'rb');
             fpassthru($fp);
         }
     }
+    if (!$found) {
+        gracefuldeath_httpcode(410);
+    }
 
 } else {
-    gracefuldeath_html("content request malformed!");
+    gracefuldeath_httpcode(400);
 }
 ?>
diff --git a/index.php b/index.php
index 1743d2b..ad5cf8c 100644
--- a/index.php
+++ b/index.php
@@ -20,7 +20,7 @@
     //Show appropriate instructions for platform
     $client = strtolower($_SERVER['HTTP_USER_AGENT']);
     if (strpos($client, "hpwos") || strpos($client, "webos")) {
-        echo "Welcome webOS User! This sharing service was made for you in mind, but the web front-end doesn't work on your current device. Instead, you can <a href='http://appcatalog.webosarchive.com/showMuseumDetails.php?search=share+space&app=1005788'>download the native webOS App called Share Space</a>, that works on Touchpad, Pre and all the other webOS phones!";
+        echo "Welcome webOS User! This sharing service was made with you in mind, but this web front-end doesn't work on your current device. Instead, you can <a href='http://appcatalog.webosarchive.com/showMuseumDetails.php?search=share+space&app=1005788'>download the native webOS App called Share Space</a>, that works on Touchpad, Pre and all the other webOS phones!";
     } else {
         echo "<span style='font-size: smaller; color: dimgray;'>The Share Service is a file sharing web app for retro devices -- but it works with modern devices too! You can create an account where you can share pictures or text with others, or they can share with you!</span>";
     }
diff --git a/ithumb.php b/ithumb.php
index 46ca06c..4f4a735 100644
--- a/ithumb.php
+++ b/ithumb.php
@@ -15,8 +15,7 @@ if (isset($_GET['itemid']) && $_GET['itemid'] != "") {
         $itemid = $_SERVER['QUERY_STRING'];
 }
 if (!isset($itemid)) {    //Deal with no usable request
-    header($_SERVER["SERVER_PROTOCOL"] . " 400 Bad Request");
-    die;
+    gracefuldeath_httpcode(400);
 }
 
 $sharehandle = base64url_decode($itemid);
@@ -26,14 +25,16 @@ if (count($shareparts) > 1) {
     $contentid = $shareparts[1];
 
     if (!is_dir("data/" . $username)) {
-        gracefuldeath_html("user does not exist!");
+        gracefuldeath_httpcode(417);
     }
 
     //Make sure the file exists and can be loaded
-    $jsondata = get_share_data($username, $config['readonlykey'], 'gracefuldeath_html');
+    $jsondata = get_share_data($username, $config['readonlykey'], 'gracefuldeath_httpcode');
+    $found = false;
     foreach ($jsondata['shares'] as $share => $value) {
         if ($contentid == $value['guid'])
         {
+            $found = true;
             //Prepare the cache name
             $cacheID = "thumb-" . $value['guid'];
             $path = "data/" . $username;
@@ -54,9 +55,12 @@ if (count($shareparts) > 1) {
             exit;
         }
     }
+    if (!$found) {
+        gracefuldeath_httpcode(410);
+    }
 
 } else {
-    gracefuldeath_html("content request malformed!");
+    gracefuldeath_httpcode(400);
 }
 
 //Function to resize common image formats
diff --git a/t.php b/t.php
index 790c9aa..deb072f 100644
--- a/t.php
+++ b/t.php
@@ -5,7 +5,7 @@ include("common.php");
 
 $sharehandle = $_SERVER['QUERY_STRING'];
 if (!isset($sharehandle) || $sharehandle == "")
-    graceful_death("content request not specified!");
+    gracefuldeath_httpcode(400);
 
 if (strpos($sharehandle, "&fbclid")) {
     $sharehandle = str_replace("%3D", "=", $sharehandle);
@@ -20,15 +20,17 @@ if (count($shareparts) > 1) {
     $contentid = $shareparts[1];
 
     if (!is_dir("data/" . $username)) {
-        gracefuldeath_html("user does not exist!");
+        gracefuldeath_httpcode(417);
     }
 
     //Make sure the file exists and can be loaded
-    $jsondata = get_share_data($username, $config['readonlykey'], 'gracefuldeath_html');
+    $jsondata = get_share_data($username, $config['readonlykey'], 'gracefuldeath_httpcode');
+    $found = false;
     foreach ($jsondata['shares'] as $share => $value) {
         //print_r($value);
         if ($contentid == $value['guid'])
         {
+            $found = true;
             if ($value['contenttype'] == "application/json") {
                 header('Content-Type: application/json');
                 print_r(json_encode($value['content'], JSON_PRETTY_PRINT));
@@ -39,9 +41,12 @@ if (count($shareparts) > 1) {
             }
         }
     }
+    if (!$found) {
+        gracefuldeath_httpcode(410);
+    }
 
 } else {
-    gracefuldeath_html("content request malformed!");
+    gracefuldeath_httpcode(400);
 }
 
 
diff --git a/tthumb.php b/tthumb.php
index 58a2a0e..8ba2406 100644
--- a/tthumb.php
+++ b/tthumb.php
@@ -1,7 +1,6 @@
 <?php
-// ithumb Endpoint
+// tthumb Endpoint
 //      This endpoint creates (if needed) and returns an image version of a text share as binary data that can be the source of an HTML img element
-//      It needs work.
 include ("common.php");
 
 //Handle more specific queries
@@ -16,8 +15,7 @@ if (isset($_GET['itemid']) && $_GET['itemid'] != "") {
         $itemid = $_SERVER['QUERY_STRING'];
 }
 if (!isset($itemid)) {    //Deal with no usable request
-    header($_SERVER["SERVER_PROTOCOL"] . " 400 Bad Request");
-    die;
+    gracefuldeath_httpcode(400);
 }
 
 $sharehandle = base64url_decode($itemid);
@@ -27,14 +25,16 @@ if (count($shareparts) > 1) {
     $contentid = $shareparts[1];
 
     if (!is_dir("data/" . $username)) {
-        gracefuldeath_html("user does not exist!");
+        gracefuldeath_httpcode(417);
     }
 
     //Make sure the file exists and can be loaded
-    $jsondata = get_share_data($username, $config['readonlykey'], 'gracefuldeath_html');
+    $jsondata = get_share_data($username, $config['readonlykey'], 'gracefuldeath_httpcode');
+    $found = false;
     foreach ($jsondata['shares'] as $share => $value) {
         if ($contentid == $value['guid'])
         {
+            $found = true;
             if ($value['contenttype'] == "application/json") {
                 $usetext = json_encode($value['content']);
             }
@@ -64,9 +64,12 @@ if (count($shareparts) > 1) {
             }
         }
     }
+    if (!$found) {
+        gracefuldeath_httpcode(410);
+    }
 
 } else {
-    gracefuldeath_html("content request malformed!");
+    gracefuldeath_httpcode(400);
 }
 
 //Function to make an image square out of text