Moved to before filter.

app/models/observer/ticket/close_time.rb

@@ -3,11 +3,11 @@
 class Observer::Ticket::CloseTime < ActiveRecord::Observer
   observe 'ticket'
 
-  def after_create(record)
+  def before_create(record)
     _check(record)
   end
 
-  def after_update(record)
+  def before_update(record)
     _check(record)
   end
 
@@ -29,8 +29,5 @@ class Observer::Ticket::CloseTime < ActiveRecord::Observer
 
     # set close_time
     record.close_time = Time.now
-
-    # save ticket
-    record.save
   end
 end