Tweak.

4chan_x.user.js

@@ -909,7 +909,7 @@
     },
     initHeaderReady: function() {
       var header, nav, settings, _ref, _ref1, _ref2;
-      if (!$.id('navtopr')) {
+      if (!$.id('navtopright')) {
         return;
       }
       header = Main.header;
@@ -981,7 +981,7 @@
         }
         return;
       }
-      if (!$.id('navtopr')) {
+      if (!$.id('navtopright')) {
         return;
       }
       threads = [];
@@ -1371,7 +1371,11 @@
       return root;
     },
     fetchedPost: function(req, board, threadID, postID, root) {
-      var clone, doc, href, inBoard, inThread, link, pc, post, quote, status, url, _i, _len, _ref;
+      var doc, href, inBoard, inThread, link, pc, post, quote, status, url, _i, _len, _ref;
+      if (post = g.posts["" + board + "." + postID]) {
+        Get.insert(post, root);
+        return;
+      }
       status = req.status;
       if (status !== 200) {
         if (url = Redirect.post(board, postID)) {
@@ -1412,19 +1416,16 @@
       link.nextSibling.href = "/" + board + "/res/" + threadID + "#q" + postID;
       inBoard = g.boards[board] || new Board(board);
       inThread = g.threads["" + board + "." + threadID] || new Thread(threadID, inBoard);
-      if (!(post = g.posts["" + board + "." + postID])) {
+      post = new Post(postContainer, thread, board);
-        post = new Post(postContainer, thread, board);
+      Main.callbackNodes(Post, [post]);
-        Main.callbackNodes(Post, [post]);
+      return Get.insert(post, root);
-      }
-      if (!root.parentNode) {
-        return;
-      }
-      clone = post.addClone();
-      Main.callbackNodes(Post, [clone]);
-      return $.replace(root.firstChild, Get.cleanRoot(clone));
     },
     archivedPost: function(req, board, postID, root) {
-      var bq, clone, comment, data, post, postContainer, thread, threadID;
+      var bq, comment, data, post, postContainer, thread, threadID;
+      if (post = g.posts["" + board + "." + postID]) {
+        Get.insert(post, root);
+        return;
+      }
       data = JSON.parse(req.response);
       if (data.error) {
         $.addClass(root, 'warning');
@@ -1492,12 +1493,14 @@
       });
       board = g.boards[board] || new Board(board);
       thread = g.threads["" + board + "." + threadID] || new Thread(threadID, board);
-      if (!(post = g.posts["" + board + "." + postID])) {
+      post = new Post(postContainer, thread, board, {
-        post = new Post(postContainer, thread, board, {
+        isArchived: true
-          isArchived: true
+      });
-        });
+      Main.callbackNodes(Post, [post]);
-        Main.callbackNodes(Post, [post]);
+      return Get.insert(post, root);
-      }
+    },
+    insert: function(post, root) {
+      var clone;
       if (!root.parentNode) {
         return;
       }

script.coffee

@@ -714,7 +714,7 @@ Main =
     localStorage.setItem '4chan_settings', false
     $.ready Main.initHeaderReady
   initHeaderReady: ->
-    return unless $.id 'navtopr'
+    return unless $.id 'navtopright'
     header = Main.header
     $.prepend d.body, header
 
@@ -780,7 +780,7 @@ Main =
         location.href = Redirect.thread g.BOARD, g.THREAD, location.hash
       return
 
-    return unless $.id 'navtopr'
+    return unless $.id 'navtopright'
 
     threads = []
     posts   = []
@@ -1160,6 +1160,11 @@ Get =
       $.rm child unless child is post
     root
   fetchedPost: (req, board, threadID, postID, root) ->
+    # In case of multiple callbacks for the same request,
+    # don't parse the same original post more than once.
+    if post = g.posts["#{board}.#{postID}"]
+      Get.insert post, root
+      return
     {status} = req
     if status isnt 200
       # The thread can die by the time we check a quote.
@@ -1201,18 +1206,15 @@ Get =
       new Board board
     inThread = g.threads["#{board}.#{threadID}"] or
       new Thread threadID, inBoard
+    post = new Post postContainer, thread, board
+    Main.callbackNodes Post, [post]
+    Get.insert post, root
+  archivedPost: (req, board, postID, root) ->
     # In case of multiple callbacks for the same request,
     # don't parse the same original post more than once.
-    unless post = g.posts["#{board}.#{postID}"]
+    if post = g.posts["#{board}.#{postID}"]
-      post = new Post postContainer, thread, board
+      Get.insert post, root
-      Main.callbackNodes Post, [post]
+      return
-
-    # Stop here if the container has been removed while loading.
-    return unless root.parentNode
-    clone = post.addClone()
-    Main.callbackNodes Post, [clone]
-    $.replace root.firstChild, Get.cleanRoot clone
-  archivedPost: (req, board, postID, root) ->
     data = JSON.parse req.response
     if data.error
       $.addClass root, 'warning'
@@ -1293,13 +1295,11 @@ Get =
       new Board board
     thread = g.threads["#{board}.#{threadID}"] or
       new Thread threadID, board
-    # In case of multiple callbacks for the same request,
+    post = new Post postContainer, thread, board,
-    # don't parse the same original post more than once.
+      isArchived: true
-    unless post = g.posts["#{board}.#{postID}"]
+    Main.callbackNodes Post, [post]
-      post = new Post postContainer, thread, board,
+    Get.insert post, root
-        isArchived: true
+  insert: (post, root) ->
-      Main.callbackNodes Post, [post]
-
     # Stop here if the container has been removed while loading.
     return unless root.parentNode
     clone = post.addClone()