gistfile1.txt

--- a/vendor/plugins/paperclip/lib/paperclip.rb
+++ b/vendor/plugins/paperclip/lib/paperclip.rb
@@ -222,8 +222,8 @@ module Paperclip
       after_save :save_attached_files
       before_destroy :destroy_attached_files
 
-      define_callbacks :before_post_process, :after_post_process
-      define_callbacks :"before_#{name}_post_process", :"after_#{name}_post_process"
+      define_model_callbacks :post_process
+      define_model_callbacks :"#{name}_post_process"
      
       define_method name do |*args|
         a = attachment_for(name)