diff --git a/4chan_x.user.js b/4chan_x.user.js
index 9dd7b7d11..d3c0d9bde 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -3907,17 +3907,20 @@
         req = ThreadUpdater.req;
         switch (req.status) {
           case 200:
+            g.DEAD = false;
             ThreadUpdater.parse(JSON.parse(req.response).posts);
             ThreadUpdater.lastModified = req.getResponseHeader('Last-Modified');
             ThreadUpdater.set('timer', ThreadUpdater.getInterval());
             break;
           case 404:
+            g.DEAD = true;
             ThreadUpdater.set('timer', null);
             ThreadUpdater.set('status', '404', 'warning');
             clearTimeout(ThreadUpdater.timeoutID);
             ThreadUpdater.thread.kill();
             $.event('ThreadUpdate', {
-              404: true
+              404: true,
+              thread: ThreadUpdater.thread
             });
             break;
           default:
@@ -4052,6 +4055,7 @@
       }
       return $.event('ThreadUpdate', {
         404: false,
+        thread: ThreadUpdater.thread,
         newPosts: posts,
         deletedPosts: deletedPosts,
         deletedFiles: deletedFiles
@@ -4104,6 +4108,13 @@
           return QR.hide();
         }
       });
+      $.on(d, 'ThreadUpdate', function() {
+        if (g.DEAD) {
+          return QR.abort();
+        } else {
+          return QR.status();
+        }
+      });
       return Post.prototype.callbacks.push({
         name: 'Quick Reply',
         cb: this.node
@@ -4145,7 +4156,7 @@
       if (!Conf['Remember Spoiler'] && (spoiler = $.id('spoiler')).checked) {
         spoiler.click();
       }
-      return QR.cleanNotification();
+      return QR.cleanNotifications();
     },
     hide: function() {
       d.activeElement.blur();
@@ -4178,14 +4189,17 @@
       if (d.hidden) {
         alert(el.textContent);
       }
-      return QR.lastNotification = new Notification('warning', el);
+      return QR.lastNotifications.push(new Notification('warning', el));
     },
-    cleanNotification: function() {
-      var _ref;
-      if ((_ref = QR.lastNotification) != null) {
-        _ref.close();
+    lastNotifications: [],
+    cleanNotifications: function() {
+      var notification, _i, _len, _ref;
+      _ref = QR.lastNotifications;
+      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
+        notification = _ref[_i];
+        notification.close();
       }
-      return delete QR.lastNotification;
+      return QR.lastNotification = [];
     },
     status: function(data) {
       var disabled, input, value;
@@ -4377,7 +4391,7 @@
     },
     fileInput: function() {
       var file, _i, _len, _ref;
-      QR.cleanNotification();
+      QR.cleanNotifications();
       if (this.files.length === 1) {
         file = this.files[0];
         if (file.size > this.max) {
@@ -4395,11 +4409,9 @@
       for (_i = 0, _len = _ref.length; _i < _len; _i++) {
         file = _ref[_i];
         if (file.size > this.max) {
-          QR.error("File " + file.name + " is too large.");
-          break;
+          QR.error("File " + file.name + " is too large (" + ($.bytesToString(file.size)) + ").");
         } else if (-1 === QR.mimeTypes.indexOf(file.type)) {
           QR.error("" + file.name + ": Unsupported file type.");
-          break;
         }
         if (!QR.replies[QR.replies.length - 1].file) {
           QR.replies[QR.replies.length - 1].setFile(file);
@@ -4868,7 +4880,7 @@
         QR.error(err);
         return;
       }
-      QR.cleanNotification();
+      QR.cleanNotifications();
       QR.cooldown.auto = QR.replies.length > 1;
       if (Conf['Auto Hide QR'] && !QR.cooldown.auto) {
         QR.hide();
@@ -4927,6 +4939,7 @@
     },
     response: function(html) {
       var ban, board, err, h1, persona, postID, reply, threadID, tmpDoc, _, _ref, _ref1;
+      delete QR.ajax;
       tmpDoc = d.implementation.createHTMLDocument('');
       tmpDoc.documentElement.innerHTML = html;
       if (ban = $('.banType', tmpDoc)) {
@@ -4958,7 +4971,8 @@
         return;
       }
       h1 = $('h1', tmpDoc);
-      QR.lastNotification = new Notification('success', h1.textContent, 5);
+      QR.cleanNotifications();
+      QR.lastNotifications.push(new Notification('success', h1.textContent, 5));
       reply = QR.replies[0];
       persona = $.get('QR.persona', {});
       persona = {
@@ -4991,11 +5005,11 @@
       return QR.resetFileInput();
     },
     abort: function() {
-      var _ref;
-      if ((_ref = QR.ajax) != null) {
-        _ref.abort();
+      if (QR.ajax) {
+        QR.ajax.abort();
+        delete QR.ajax;
+        QR.error('QR upload aborted.');
       }
-      delete QR.ajax;
       return QR.status();
     }
   };
diff --git a/src/features.coffee b/src/features.coffee
index c1f6adfe0..2695fbfdb 100644
--- a/src/features.coffee
+++ b/src/features.coffee
@@ -2410,21 +2410,24 @@ ThreadUpdater =
       {req} = ThreadUpdater
       switch req.status
         when 200
+          g.DEAD = false
           ThreadUpdater.parse JSON.parse(req.response).posts
           ThreadUpdater.lastModified = req.getResponseHeader 'Last-Modified'
           ThreadUpdater.set 'timer', ThreadUpdater.getInterval()
         when 404
+          g.DEAD = true
           ThreadUpdater.set 'timer', null
           ThreadUpdater.set 'status', '404', 'warning'
           clearTimeout ThreadUpdater.timeoutID
           ThreadUpdater.thread.kill()
-          $.event 'ThreadUpdate', 404: true
+          $.event 'ThreadUpdate',
+            404: true
+            thread: ThreadUpdater.thread
           # if Conf['Unread Count']
           #   Unread.title = Unread.title.match(/^.+-/)[0] + ' 404'
           # else
           #   d.title = d.title.match(/^.+-/)[0] + ' 404'
           # Unread.update true
-          # QR.abort()
         else
           ThreadUpdater.outdateCount++
           ThreadUpdater.set 'timer',  ThreadUpdater.getInterval()
@@ -2536,6 +2539,7 @@ ThreadUpdater =
 
     $.event 'ThreadUpdate',
       404: false
+      thread: ThreadUpdater.thread
       newPosts: posts
       deletedPosts: deletedPosts
       deletedFiles: deletedFiles
diff --git a/src/qr.coffee b/src/qr.coffee
index 56ead95f5..d2a2fa110 100644
--- a/src/qr.coffee
+++ b/src/qr.coffee
@@ -32,6 +32,11 @@ QR =
       return unless Conf['Persistent QR']
       QR.open()
       QR.hide() if Conf['Auto Hide QR']
+    $.on d, 'ThreadUpdate', ->
+      if g.DEAD
+        QR.abort()
+      else
+        QR.status()
 
     Post::callbacks.push
       name: 'Quick Reply'
@@ -64,7 +69,7 @@ QR =
     QR.resetFileInput()
     if not Conf['Remember Spoiler'] and (spoiler = $.id 'spoiler').checked
       spoiler.click()
-    QR.cleanNotification()
+    QR.cleanNotifications()
   hide: ->
     d.activeElement.blur()
     $.addClass QR.el, 'autohide'
@@ -89,10 +94,12 @@ QR =
       # Focus the captcha input on captcha error.
       $('[autocomplete]', QR.el).focus()
     alert el.textContent if d.hidden
-    QR.lastNotification = new Notification 'warning', el
-  cleanNotification: ->
-    QR.lastNotification?.close()
-    delete QR.lastNotification
+    QR.lastNotifications.push new Notification 'warning', el
+  lastNotifications: []
+  cleanNotifications: ->
+    for notification in QR.lastNotifications
+      notification.close()
+    QR.lastNotification = []
 
   status: (data={}) ->
     return unless QR.el
@@ -278,7 +285,7 @@ QR =
     QR.fileInput.call e.dataTransfer
     $.addClass QR.el, 'dump'
   fileInput: ->
-    QR.cleanNotification()
+    QR.cleanNotifications()
     # Set or change current reply's file.
     if @files.length is 1
       file = @files[0]
@@ -294,11 +301,9 @@ QR =
     # Create new replies with these files.
     for file in @files
       if file.size > @max
-        QR.error "File #{file.name} is too large."
-        break
+        QR.error "File #{file.name} is too large (#{$.bytesToString file.size})."
       else if -1 is QR.mimeTypes.indexOf file.type
         QR.error "#{file.name}: Unsupported file type."
-        break
       unless QR.replies[QR.replies.length - 1].file
         # set last reply's file
         QR.replies[QR.replies.length - 1].setFile file
@@ -668,7 +673,7 @@ QR =
       QR.status()
       QR.error err
       return
-    QR.cleanNotification()
+    QR.cleanNotifications()
 
     # Enable auto-posting if we have stuff to post, disable it otherwise.
     QR.cooldown.auto = QR.replies.length > 1
@@ -722,6 +727,8 @@ QR =
     QR.ajax = $.ajax $.id('postForm').parentNode.action, callbacks, opts
 
   response: (html) ->
+    delete QR.ajax
+
     tmpDoc = d.implementation.createHTMLDocument ''
     tmpDoc.documentElement.innerHTML = html
     if ban  = $ '.banType', tmpDoc # banned/warning
@@ -763,7 +770,8 @@ QR =
       return
 
     h1 = $ 'h1', tmpDoc
-    QR.lastNotification = new Notification 'success', h1.textContent, 5
+    QR.cleanNotifications()
+    QR.lastNotifications.push new Notification 'success', h1.textContent, 5
 
     reply = QR.replies[0]
 
@@ -803,6 +811,8 @@ QR =
     QR.resetFileInput()
 
   abort: ->
-    QR.ajax?.abort()
-    delete QR.ajax
+    if QR.ajax
+      QR.ajax.abort()
+      delete QR.ajax
+      QR.error 'QR upload aborted.'
     QR.status()