Rails 3.05 breaks request.session_options[:id] from working the same as 3.03

I have an application that has been working for months using Rails 3.03. I did an upgrade to 3.05 and request.session_options[:id] broke. For some reason it does not alway return a value. When the page loads for the first time the request.session_options[:id] returns the id. The page has a form that uses Ajax call to another function in the same controller. The call also uses request.session_options[:id] but in this call it returns nil.

I saw a post for 2.3 that looked similar and I tried accessing the session before request.session_options[:id] but that did not work.