diff --git a/src/Miscellaneous/ExpandComment.coffee b/src/Miscellaneous/ExpandComment.coffee
index 3e8da0ef9..6fbf847e0 100644
--- a/src/Miscellaneous/ExpandComment.coffee
+++ b/src/Miscellaneous/ExpandComment.coffee
@@ -2,9 +2,6 @@ ExpandComment =
   init: ->
     return if g.VIEW isnt 'index' or !Conf['Comment Expansion'] or Conf['JSON Index']
 
-    @callbacks.push Fourchan.code if g.BOARD.ID is 'g'
-    @callbacks.push Fourchan.math if g.BOARD.ID is 'sci'
-
     Callbacks.Post.push
       name: 'Comment Expansion'
       cb:   @node
diff --git a/src/Miscellaneous/Fourchan.coffee b/src/Miscellaneous/Fourchan.coffee
index 581e0559e..7fba2af7f 100644
--- a/src/Miscellaneous/Fourchan.coffee
+++ b/src/Miscellaneous/Fourchan.coffee
@@ -1,8 +1,11 @@
 Fourchan =
   init: ->
-    return unless g.VIEW in ['index', 'thread', 'archive']
+    return unless Site.software is 'yotsuba' and g.VIEW in ['index', 'thread', 'archive']
+    BoardConfig.ready @initBoard
+    Main.ready @initReady
 
-    if g.BOARD.ID is 'g'
+  initBoard: ->
+    if g.BOARD.config.code_tags
       $.on window, 'prettyprint:cb', (e) ->
         return if not (post = g.posts[e.detail.ID])
         return if not (pre  = $$('.prettyprint', post.nodes.comment)[e.detail.i])
@@ -21,10 +24,12 @@ Fourchan =
         }, false);
       '''
       Callbacks.Post.push
-        name: 'Parse /g/ code'
-        cb:   @code
+        name: 'Parse [code] tags'
+        cb:   Fourchan.code
+      g.posts.forEach (post) -> Callbacks.Post.execute post, ['Parse [code] tags'], true
+      ExpandComment.callbacks.push Fourchan.code
 
-    if g.BOARD.ID is 'sci'
+    if g.BOARD.config.math_tags
       $.global ->
         window.addEventListener 'mathjax', (e) ->
           if window.MathJax
@@ -40,16 +45,18 @@ Fourchan =
               , false
         , false
       Callbacks.Post.push
-        name: 'Parse /sci/ math'
-        cb:   @math
+        name: 'Parse [math] tags'
+        cb:   Fourchan.math
+      g.posts.forEach (post) -> Callbacks.Post.execute post, ['Parse [math] tags'], true
+      ExpandComment.callbacks.push Fourchan.math
 
-    # Disable 4chan's ID highlighting (replaced by IDHighlight) and reported post hiding.
-    Main.ready ->
-      $.global ->
-        window.clickable_ids = false
-        for node in document.querySelectorAll '.posteruid, .capcode'
-          node.removeEventListener 'click', window.idClick, false
-        return
+  # Disable 4chan's ID highlighting (replaced by IDHighlight) and reported post hiding.
+  initReady: ->
+    $.global ->
+      window.clickable_ids = false
+      for node in document.querySelectorAll '.posteruid, .capcode'
+        node.removeEventListener 'click', window.idClick, false
+      return
 
   code: ->
     return if @isClone
diff --git a/src/classes/Callbacks.coffee b/src/classes/Callbacks.coffee
index 797bd6129..f35629d9b 100644
--- a/src/classes/Callbacks.coffee
+++ b/src/classes/Callbacks.coffee
@@ -10,8 +10,8 @@ class Callbacks
     @keys.push name unless @[name]
     @[name] = cb
 
-  execute: (node, keys=@keys) ->
-    return if node.callbacksExecuted
+  execute: (node, keys=@keys, force) ->
+    return if node.callbacksExecuted and !force
     node.callbacksExecuted = true
     for name in keys
       try
diff --git a/src/site/SW.tinyboard.coffee b/src/site/SW.tinyboard.coffee
index 6e9f6fecc..307614a99 100644
--- a/src/site/SW.tinyboard.coffee
+++ b/src/site/SW.tinyboard.coffee
@@ -9,7 +9,6 @@ SW.tinyboard =
     'Image Host Rewriting'
     'Index Generator'
     'Announcement Hiding'
-    'Fourchan thingies'
     'Resurrect Quotes'
     'Quick Reply Personas'
     'Quick Reply'