If you're using SqlSessionStore (originally from Stefan Kaes of railsexpress.de) and upgrade to Rails 2.3, it will break.
I have a github version that I have updated for Rails 2.3, and also added a new "native columns" feature to. It is available here: http://github.com/nateware/sql_session_store/tree/master
It is backwards-compatible with Rails 2.2 and earlier, so you should be able to update your application (probably worth backing up the old one just in case).
Nate Wiger PlayStation
