Bugfixes and Rails Edge

Update to Rails 2.3.1.
  (Actually, not quite. Doesn't look like 2.3.1 will be released
   today, but I REALLY want to push these bugfixes out.)
Removed bundled Rack (Rails 2.3.1 comes bundled with Rack 1.0).
Add
     config.action_view.cache_template_loading = true
  to production environment.
Fix FastCGI bug (http://rubyforge.org/tracker/index.php?func=detail&aid=24191&group_id=186&atid=783).
Fix WikiWords bug (http://rubyforge.org/pipermail/instiki-users/2009-February/001181.html).

vendor/rails/actionpack/lib/action_controller/test_case.rb

@@ -127,9 +127,14 @@ module ActionController
     #
     # The exception is stored in the exception accessor for further inspection.
     module RaiseActionExceptions
-      protected
-        attr_accessor :exception
+      def self.included(base)
+        base.class_eval do
+          attr_accessor :exception
+          protected :exception, :exception=
+        end
+      end
 
+      protected
         def rescue_action_without_handler(e)
           self.exception = e