diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 096eddf97..011be3171 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -42,7 +42,7 @@ class ApplicationController < ActionController::Base
   end
 
   before_filter :session_expiration, :user_setup, :check_if_login_required, :set_localization
-  
+  before_filter :user_agent
 
   rescue_from ActionController::InvalidAuthenticityToken, :with => :invalid_authenticity_token
   rescue_from ::Unauthorized, :with => :deny_access
@@ -51,7 +51,10 @@ class ApplicationController < ActionController::Base
   include Redmine::Search::Controller
   include Redmine::MenuManager::MenuController
   helper Redmine::MenuManager::MenuHelper
-
+  
+  def user_agent
+    logger.info "HTTP_USER_AGENT #{request.env["HTTP_USER_AGENT"]}" 
+  end
 
   def session_expiration
     if session[:user_id]
@@ -65,6 +68,7 @@ class ApplicationController < ActionController::Base
     end
   end
 
+     
   def session_expired?
     if Setting.session_lifetime?
       unless session[:ctime] && (Time.now.utc.to_i - session[:ctime].to_i <= Setting.session_lifetime.to_i * 60)