diff --git a/4chan_x.user.js b/4chan_x.user.js
index 2f319a5ad..18da7935f 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -1242,16 +1242,22 @@
       return $('#recaptcha_response_field').id = '';
     },
     attach: function() {
-      var fileDiv, files;
+      var fileDiv;
       $('#auto', qr.el).checked = true;
-      files = $('#files', qr.el);
       fileDiv = $.el('div', {
         innerHTML: '<input type=file name=upfile><a>X</a>'
       });
       $.bind(fileDiv.lastChild, 'click', (function() {
         return $.rm(this.parentNode);
       }));
-      return $.prepend(files, file);
+      return $.prepend(qr.files, fileDiv);
+    },
+    attachNext: function() {
+      var file, fileDiv, oldFile;
+      fileDiv = $.rm(qr.files.lastChild);
+      file = fileDiv.firstChild;
+      oldFile = $('#qr_form input[type=file]', qr.el);
+      return $.replace(oldFile, file);
     },
     autoPost: function() {
       var captcha, responseField;
@@ -1307,6 +1313,7 @@
         top: '0px',
         left: '0px'
       }, html);
+      qr.files = $('#files', qr.el);
       qr.refresh();
       $('textarea', qr.el).value = $('textarea').value;
       $.bind($('input[name=name]', qr.el), 'mousedown', function(e) {
@@ -1321,7 +1328,7 @@
       return $.append(d.body, qr.el);
     },
     message: function(e) {
-      var data, duration, file, fileDiv, oldFile;
+      var data, duration;
       Recaptcha.reload();
       $('iframe[name=iframe]').src = 'about:blank';
       data = e.data;
@@ -1331,19 +1338,22 @@
         $('#recaptcha_response_field', qr.el).value = '';
         $('#autohide', qr.el).checked = false;
         if (data.textContent === 'You seem to have mistyped the verification.') {
-          qr.autoPost();
+          if (qr.captcha.length) {
+            qr.autoPost();
+          }
+        } else if (data.textContent === 'Error: Duplicate file entry detected.' && qr.files.childElementCount) {
+          qr.attachNext();
+          if (qr.captcha.length) {
+            qr.autoPost();
+          }
         }
         return;
       }
       if (qr.el) {
-        fileDiv = $('#files div:last-child', qr.el);
-        if (g.REPLY && (conf['Persistent QR'] || fileDiv)) {
+        if (g.REPLY && (conf['Persistent QR'] || qr.files.childElementCount)) {
           qr.refresh();
-          if (fileDiv) {
-            $.rm(fileDiv);
-            file = fileDiv.firstChild;
-            oldFile = $('#qr_form input[type=file]', qr.el);
-            $.replace(oldFile, file);
+          if (qr.files.childElementCount) {
+            qr.attachNext();
           }
         } else {
           qr.close();
diff --git a/script.coffee b/script.coffee
index 9c2ebb627..c59758f06 100644
--- a/script.coffee
+++ b/script.coffee
@@ -966,10 +966,10 @@ cooldown =
         qr.autoPost()
 
 qr =
+  # TODO
   # error handling
   # persistent captcha
   # rm Recaptcha
-  # group captcha
   # error too large error should happen on attach
   init: ->
     g.callbacks.push qr.node
@@ -987,10 +987,15 @@ qr =
 
   attach: ->
     $('#auto', qr.el).checked = true
-    files = $ '#files', qr.el
     fileDiv = $.el 'div', innerHTML: '<input type=file name=upfile><a>X</a>'
     $.bind fileDiv.lastChild, 'click', (-> $.rm @parentNode)
-    $.prepend files, file
+    $.prepend qr.files, fileDiv
+
+  attachNext: ->
+    fileDiv = $.rm qr.files.lastChild
+    file = fileDiv.firstChild
+    oldFile = $ '#qr_form input[type=file]', qr.el
+    $.replace oldFile, file
 
   autoPost: ->
     responseField = $ '#recaptcha_response_field', qr.el
@@ -1053,6 +1058,7 @@ qr =
       <a id=error class=error></a>
       "
     qr.el = ui.dialog 'qr', top: '0px', left: '0px', html
+    qr.files = $ '#files', qr.el
 
     qr.refresh()
     $('textarea', qr.el).value = $('textarea').value
@@ -1078,18 +1084,19 @@ qr =
       $('#recaptcha_response_field', qr.el).value = ''
       $('#autohide', qr.el).checked = false
       if data.textContent is 'You seem to have mistyped the verification.'
-        qr.autoPost()
+        if qr.captcha.length
+          qr.autoPost()
+      else if data.textContent is 'Error: Duplicate file entry detected.' and qr.files.childElementCount
+        qr.attachNext()
+        if qr.captcha.length
+          qr.autoPost()
       return
 
     if qr.el
-      fileDiv = $ '#files div:last-child', qr.el
-      if g.REPLY and (conf['Persistent QR'] or fileDiv)
+      if g.REPLY and (conf['Persistent QR'] or qr.files.childElementCount)
         qr.refresh()
-        if fileDiv
-          $.rm fileDiv
-          file = fileDiv.firstChild
-          oldFile = $ '#qr_form input[type=file]', qr.el
-          $.replace oldFile, file
+        if qr.files.childElementCount
+          qr.attachNext()
       else
         qr.close()
     if conf['Cooldown']