diff --git a/app/models/user.rb b/app/models/user.rb
index 98a1187..f37c090 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -50,6 +50,13 @@ class User < ActiveRecord::Base
   BANNED_USERNAMES = [ "admin", "administrator", "hostmaster", "mailer-daemon",
     "postmaster", "root", "security", "support", "webmaster", ]
 
+  def self.recalculate_all_karmas!
+    User.all.each do |u|
+      u.karma = u.stories.map(&:score).sum + u.comments.map(&:score).sum
+      u.save!
+    end
+  end
+
   def as_json(options = {})
     h = super(:only => [
       :username,
diff --git a/app/models/vote.rb b/app/models/vote.rb
index 23d0867..30aa09c 100644
--- a/app/models/vote.rb
+++ b/app/models/vote.rb
@@ -131,7 +131,7 @@ class Vote < ActiveRecord::Base
         if v.comment_id
           c = Comment.find(v.comment_id)
           if c.user_id != user_id
-            User.update_counters user_id, :karma => upvote - downvote
+            User.update_counters c.user_id, :karma => upvote - downvote
           end
 
           c.give_upvote_or_downvote_and_recalculate_confidence!(upvote,