diff --git a/4chan_x.user.js b/4chan_x.user.js
index c1cab46f4..1bdc4a114 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -2596,7 +2596,7 @@
       return QR.ajax = $.ajax($.id('postForm').parentNode.action, callbacks, opts);
     },
     response: function(html) {
-      var ban, board, doc, err, msg, persona, postID, reply, threadID, _, _ref, _ref1;
+      var ban, board, doc, err, persona, postID, reply, threadID, _, _ref, _ref1;
       doc = d.implementation.createHTMLDocument('');
       doc.documentElement.innerHTML = html;
       if (ban = $('.banType', doc)) {
@@ -2608,7 +2608,7 @@
         if ((_ref = $('a', err)) != null) {
           _ref.target = '_blank';
         }
-      } else if (!(msg = $('b', doc))) {
+      } else if (doc.title !== 'Post successful!') {
         err = 'Connection error with sys.4chan.org.';
       }
       if (err) {
@@ -2635,7 +2635,7 @@
         sub: Conf['Remember Subject'] ? reply.sub : null
       };
       $.set('QR.persona', persona);
-      _ref1 = msg.lastChild.textContent.match(/thread:(\d+),no:(\d+)/), _ = _ref1[0], threadID = _ref1[1], postID = _ref1[2];
+      _ref1 = doc.body.lastChild.textContent.match(/thread:(\d+),no:(\d+)/), _ = _ref1[0], threadID = _ref1[1], postID = _ref1[2];
       $.event(QR.el, new CustomEvent('QRPostSuccessful', {
         bubbles: true,
         detail: {
diff --git a/changelog b/changelog
index 72d0455e3..e521b62eb 100644
--- a/changelog
+++ b/changelog
@@ -1,4 +1,6 @@
 master
+- Mayhem
+  Fix successful posting causing errors.
 
 2.37.2
 - aeosynth
diff --git a/script.coffee b/script.coffee
index b934f446c..8a59673b4 100644
--- a/script.coffee
+++ b/script.coffee
@@ -2060,7 +2060,7 @@ QR =
           "Reason: #{$('.reason', doc).innerHTML}"
     else if err = doc.getElementById 'errmsg' # error!
       $('a', err)?.target = '_blank' # duplicate image link
-    else unless msg = $ 'b', doc
+    else if doc.title isnt 'Post successful!'
       err = 'Connection error with sys.4chan.org.'
 
     if err
@@ -2096,7 +2096,7 @@ QR =
       sub:   if Conf['Remember Subject']  then reply.sub     else null
     $.set 'QR.persona', persona
 
-    [_, threadID, postID] = msg.lastChild.textContent.match /thread:(\d+),no:(\d+)/
+    [_, threadID, postID] = doc.body.lastChild.textContent.match /thread:(\d+),no:(\d+)/
 
     # Post/upload confirmed as successful.
     $.event QR.el, new CustomEvent 'QRPostSuccessful',