diff --git a/4chan_x.user.js b/4chan_x.user.js
index eb4452cca..3542bd3ae 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -2116,6 +2116,7 @@
       };
       opts = {
         form: $.formData(post),
+        responseType: 'document',
         upCallbacks: {
           onload: function() {
             return QR.status({
@@ -2131,10 +2132,14 @@
       };
       return QR.ajax = $.ajax($.id('postForm').parentNode.action, callbacks, opts);
     },
-    response: function(html) {
+    response: function(response) {
       var bs, doc, err, msg, persona, postNumber, reply, thread, _, _ref;
-      doc = d.implementation.createHTMLDocument('');
-      doc.documentElement.innerHTML = html;
+      if ($.engine === 'presto') {
+        doc = d.implementation.createHTMLDocument('');
+        doc.documentElement.innerHTML = response;
+      } else {
+        doc = response;
+      }
       if (doc.title === '4chan - Banned') {
         bs = $$('b', doc);
         err = $.el('span', {
@@ -3743,13 +3748,18 @@
           return DeleteButton.error(self);
         }
       }, {
-        form: $.formData(form)
+        form: $.formData(form),
+        responseType: 'document'
       });
     },
-    load: function(self, html) {
+    load: function(self, response) {
       var doc, msg, s;
-      doc = d.implementation.createHTMLDocument('');
-      doc.documentElement.innerHTML = html;
+      if ($.engine === 'presto') {
+        doc = d.implementation.createHTMLDocument('');
+        doc.documentElement.innerHTML = response;
+      } else {
+        doc = response;
+      }
       if (doc.title === '4chan - Banned') {
         s = 'Banned!';
       } else if (msg = doc.getElementById('errmsg')) {
diff --git a/script.coffee b/script.coffee
index 07b9bd8f9..41c310479 100644
--- a/script.coffee
+++ b/script.coffee
@@ -1605,6 +1605,7 @@ QR =
           textContent: 'Connection error, or you are banned.'
     opts =
       form: $.formData post
+      responseType: 'document'
       upCallbacks:
         onload: ->
           # Upload done, waiting for response.
@@ -1615,9 +1616,12 @@ QR =
 
     QR.ajax = $.ajax $.id('postForm').parentNode.action, callbacks, opts
 
-  response: (html) ->
-    doc = d.implementation.createHTMLDocument ''
-    doc.documentElement.innerHTML = html
+  response: (response) ->
+    if $.engine is 'presto'
+      doc = d.implementation.createHTMLDocument ''
+      doc.documentElement.innerHTML = response
+    else
+      doc = response
     if doc.title is '4chan - Banned' # Ban/warn check
       bs  = $$ 'b', doc
       err = $.el 'span',
@@ -2937,11 +2941,15 @@ DeleteButton =
         onerror: -> DeleteButton.error self
       }, {
         form: $.formData form
+        responseType: 'document'
       }
 
-  load: (self, html) ->
-    doc = d.implementation.createHTMLDocument ''
-    doc.documentElement.innerHTML = html
+  load: (self, response) ->
+    if $.engine is 'presto'
+      doc = d.implementation.createHTMLDocument ''
+      doc.documentElement.innerHTML = response
+    else
+      doc = response
     if doc.title is '4chan - Banned' # Ban/warn check
       s = 'Banned!'
     else if msg = doc.getElementById 'errmsg' # error!