diff --git a/historyKeeper.js b/historyKeeper.js
index fb1d4ab1f..52ae95b2c 100644
--- a/historyKeeper.js
+++ b/historyKeeper.js
@@ -836,7 +836,7 @@ module.exports.create = function (cfg) {
                         });
 
                         // write tasks
-                        if(tasks && metadata.expire && metadata.expire === 'number') {
+                        if(tasks && metadata.expire && typeof(metadata.expire) === 'number') {
                             // the fun part...
                             // the user has said they want this pad to expire at some point
                             tasks.write(metadata.expire, "EXPIRE", [ channelName ], function (err) {
diff --git a/storage/file.js b/storage/file.js
index 4c4867641..cbb45138d 100644
--- a/storage/file.js
+++ b/storage/file.js
@@ -505,9 +505,13 @@ var archiveChannel = function (env, channelName, cb) {
     nThen(function (w) {
         // move the channel log and abort if anything goes wrong
         Fse.move(currentPath, archivePath, { overwrite: true }, w(function (err) {
-            if (!err) { return; }
-            w.abort();
-            cb(err);
+            if (err) {
+                // proceed to the next block to remove metadata even if there's no channel
+                if (err.code === 'ENOENT') { return; }
+                // abort and callback for other types of errors
+                w.abort();
+                return void cb(err);
+            }
         }));
     }).nThen(function (w) {
         // archive the dedicated metadata channel
@@ -623,7 +627,7 @@ var flushUnusedChannels = function (env, cb, frame) {
 };
 
 /*  channelBytes
-    calls back with the size (in bytes) of a channel and its metadata
+    calls back with an error or the size (in bytes) of a channel and its metadata
 */
 var channelBytes = function (env, chanName, cb) {
     var channelPath = mkPath(env, chanName);
@@ -647,7 +651,6 @@ var channelBytes = function (env, chanName, cb) {
                 return void CB(err);
             }
             dataSize = stats.size;
-            CB(undefined, stats.size);
         }));
     }).nThen(function () {
         CB(void 0, channelSize + dataSize);
diff --git a/www/common/sframe-app-framework.js b/www/common/sframe-app-framework.js
index e2a0bd0a2..e5a992343 100644
--- a/www/common/sframe-app-framework.js
+++ b/www/common/sframe-app-framework.js
@@ -314,11 +314,21 @@ define([
             var newPad = false;
             if (newContentStr === '') { newPad = true; }
 
+            var privateDat = cpNfInner.metadataMgr.getPrivateData();
+            var type = privateDat.app;
+
             // contentUpdate may be async so we need an nthen here
             nThen(function (waitFor) {
                 if (!newPad) {
                     var newContent = JSON.parse(newContentStr);
-                    cpNfInner.metadataMgr.updateMetadata(extractMetadata(newContent));
+                    var metadata = extractMetadata(newContent);
+                    if (metadata && typeof(metadata.type) !== 'undefined' && metadata.type !== type) {
+                        var errorText = Messages.typeError;
+                        UI.errorLoadingScreen(errorText);
+                        waitFor.abort();
+                        return;
+                    }
+                    cpNfInner.metadataMgr.updateMetadata(metadata);
                     newContent = normalize(newContent);
                     contentUpdate(newContent, waitFor);
                 } else {
@@ -356,8 +366,6 @@ define([
 
                 UI.removeLoadingScreen(emitResize);
 
-                var privateDat = cpNfInner.metadataMgr.getPrivateData();
-                var type = privateDat.app;
                 if (AppConfig.textAnalyzer && textContentGetter) {
                     AppConfig.textAnalyzer(textContentGetter, privateDat.channel);
                 }