remove old buggy code see: http://meta.discourse.org/t/quoted-you-emails/2226/3

notify by display name is silly, display name is not unique in the system

app/models/post_alert_observer.rb

@@ -101,7 +101,7 @@ class PostAlertObserver < ActiveRecord::Observer
       result = []
       post.raw.scan(/\[quote=\"([^,]+),.+\"\]/).uniq.each do |m|
         username = m.first.strip.downcase
-        user = User.where("(LOWER(username_lower) = :username or LOWER(name) = :username) and id != :id", username: username, id: post.user_id).first
+        user = User.where("username_lower = :username and id != :id", username: username, id: post.user_id).first
         result << user if user.present?
       end
       result

spec/models/post_alert_observer_spec.rb

@@ -37,11 +37,6 @@ describe PostAlertObserver do
 
 
   context 'quotes' do
-    it 'notifies a user by display username' do
-      lambda {
-        Fabricate(:post, raw: '[quote="Evil Trout, post:1"]whatup[/quote]')
-      }.should change(evil_trout.notifications, :count).by(1)
-    end      
 
     it 'notifies a user by username' do
       lambda {