porting 06651829 to master. Thanks Marcelo Giorgi

activerecord/lib/active_record/association_preload.rb

@@ -279,7 +279,7 @@ def preload_through_records(records, reflection, through_association)
           end
         else
           options = {}
-          options[:include] = reflection.options[:include] || reflection.options[:source] if reflection.options[:conditions]
+          options[:include] = reflection.options[:include] || reflection.options[:source] if reflection.options[:conditions] || reflection.options[:order]
           options[:order] = reflection.options[:order]
           options[:conditions] = reflection.options[:conditions]
           records.first.class.preload_associations(records, through_association, options)