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/railties/lib/rails_generator/commands.rb

@@ -182,15 +182,19 @@ HELP
             nesting = class_name.split('::')
             name = nesting.pop
 
+            # Hack to limit const_defined? to non-inherited on 1.9.
+            extra = []
+            extra << false unless Object.method(:const_defined?).arity == 1
+
             # Extract the last Module in the nesting.
             last = nesting.inject(Object) { |last, nest|
-              break unless last.const_defined?(nest)
+              break unless last.const_defined?(nest, *extra)
               last.const_get(nest)
             }
 
             # If the last Module exists, check whether the given
             # class exists and raise a collision if so.
-            if last and last.const_defined?(name.camelize)
+            if last and last.const_defined?(name.camelize, *extra)
               raise_class_collision(class_name)
             end
           end