for openness

app/helpers/application_helper.rb

@@ -15,8 +15,11 @@ module ApplicationHelper
   end
 
   def create_guest_user
-    u = User.create(:name => "guest", :email => "guest_#{Time.now.to_i}#{rand(99)}@example.com")
-    u.admin = false
+    u = nil
+    User.without_callback(:create, :before, :initialize_desktop) do
+      u = User.create(:name => "guest", :email => "guest_#{Time.now.to_i}#{rand(99)}@example.com")
+    end    
+   u.admin = false
     u.save(:validate => false)
     u
   end