diff --git a/src/General/lib/clone.class b/src/General/lib/clone.class
index a03d67d64..4ae25630b 100755
--- a/src/General/lib/clone.class
+++ b/src/General/lib/clone.class
@@ -2,9 +2,9 @@ class Clone extends Post
   constructor: (@origin, @context, contractThumb) ->
     for key in ['ID', 'fullID', 'board', 'thread', 'info', 'quotes', 'isReply']
       # Copy or point to the origin's key value.
-      @[key] = origin[key]
+      @[key] = @origin[key]
 
-    {nodes} = origin
+    {nodes} = @origin
     root = if contractThumb
       @cloneWithoutVideo nodes.root
     else
@@ -50,11 +50,11 @@ class Clone extends Post
 
     @parseQuotes()
 
-    if origin.file
+    if @origin.file
       # Copy values, point to relevant elements.
       # See comments in Post's constructor.
       @file = {}
-      for key, val of origin.file
+      for key, val of @origin.file
         @file[key] = val
       file = $ '.file', post
       @file.text  = file.firstElementChild
@@ -67,9 +67,9 @@ class Clone extends Post
       # Contract thumbnails in quote preview
       ImageExpand.contract @ if contractThumb
 
-    @isDead  = true if origin.isDead
+    @isDead  = true if @origin.isDead
     @isClone = true
-    root.dataset.clone = origin.clones.push(@) - 1
+    root.dataset.clone = @origin.clones.push(@) - 1
 
   cloneWithoutVideo: (node) ->
     if node.tagName is 'VIDEO' and !node.dataset.md5 # (exception for WebM thumbnails)
diff --git a/src/General/lib/databoard.class b/src/General/lib/databoard.class
index 9adaec980..a59ae8f46 100755
--- a/src/General/lib/databoard.class
+++ b/src/General/lib/databoard.class
@@ -2,8 +2,8 @@ class DataBoard
   @keys = ['hiddenThreads', 'hiddenPosts', 'lastReadPosts', 'yourPosts', 'watchedThreads', 'customTitles']
 
   constructor: (@key, sync, dontClean) ->
-    @data = Conf[key]
-    $.sync key, @onSync
+    @data = Conf[@key]
+    $.sync @key, @onSync
     @clean() unless dontClean
     return unless sync
     # Chrome also fires the onChanged callback on the current tab,
diff --git a/src/General/lib/post.class b/src/General/lib/post.class
index f2b87b31a..4501cd0f2 100755
--- a/src/General/lib/post.class
+++ b/src/General/lib/post.class
@@ -91,7 +91,7 @@ class Post
       @isRebuilt = true
       @clones = g.posts[@fullID].clones
       clone.origin = @ for clone in @clones
-    g.posts.push @fullID, thread.posts.push @, board.posts.push @, @
+    g.posts.push @fullID, @thread.posts.push @, @board.posts.push @, @
 
   parseComment: ->
     # Merge text nodes and remove empty ones.
diff --git a/src/General/lib/thread.class b/src/General/lib/thread.class
index f9741c7b0..1b182dde2 100755
--- a/src/General/lib/thread.class
+++ b/src/General/lib/thread.class
@@ -18,7 +18,7 @@ class Thread
     @OP = null
     @catalogView = null
 
-    g.threads.push @fullID, board.threads.push @, @
+    g.threads.push @fullID, @board.threads.push @, @
 
   setPage: (pageNum) ->
     {info, quote} = @OP.nodes
diff --git a/src/Posting/QR.post.coffee b/src/Posting/QR.post.coffee
index 9d9aa1b6b..f13209bd1 100644
--- a/src/Posting/QR.post.coffee
+++ b/src/Posting/QR.post.coffee
@@ -152,8 +152,8 @@ QR.post = class
     return
 
   setFile: (@file, el) ->
-    @filename = file.name
-    @filesize = $.bytesToString file.size
+    @filename = @file.name
+    @filesize = $.bytesToString @file.size
     @nodes.label.hidden = false if QR.spoiler
     QR.captcha.onPostChange()
     URL.revokeObjectURL @URL