config.cache_classes = false is broken in 2.3.4 and 2.3.5

Even the most basic application is broken in 2.3.4 and 2.3.5 in development environment (where config.cache_classes = false)

Here are steps to reproduce. notice it is on the second request (not the first one) it fails:

$ rails newproject
      create                  
      create  app/controllers 
      create  app/helpers     
      create  app/models      
      create  app/views/layouts
      create  config/environments
      create  config/initializers
      create  config/locales     
      create  db                 
      create  doc                
      create  lib                
      create  lib/tasks          
      create  log                
      create  public/images      
      create  public/javascripts 
      create  public/stylesheets 
      create  script/performance 
      create  test/fixtures      
      create  test/functional    
      create  test/integration   
      create  test/performance   
      create  test/unit          
      create  vendor             
      create  vendor/plugins     
      create  tmp/sessions       
      create  tmp/sockets        
      create  tmp/cache          
      create  tmp/pids           
      create  Rakefile           
      create  README             
      create  app/controllers/application_controller.rb
      create  app/helpers/application_helper.rb        
      create  config/database.yml                      
      create  config/routes.rb                         
      create  config/locales/en.yml                    
      create  db/seeds.rb                              
      create  config/initializers/backtrace_silencers.rb
      create  config/initializers/inflections.rb        
      create  config/initializers/mime_types.rb         
      create  config/initializers/new_rails_defaults.rb 
      create  config/initializers/session_store.rb      
      create  config/environment.rb                     
      create  config/boot.rb                            
      create  config/environments/production.rb         
      create  config/environments/development.rb        
      create  config/environments/test.rb               
      create  script/about                              
      create  script/console                            
      create  script/dbconsole                          
      create  script/destroy                            
      create  script/generate                           
      create  script/runner                             
      create  script/server
      create  script/plugin
      create  script/performance/benchmarker
      create  script/performance/profiler
      create  test/test_helper.rb
      create  test/performance/browsing_test.rb
      create  public/404.html
      create  public/422.html
      create  public/500.html
      create  public/index.html
      create  public/favicon.ico
      create  public/robots.txt
      create  public/images/rails.png
      create  public/javascripts/prototype.js
      create  public/javascripts/effects.js
      create  public/javascripts/dragdrop.js
      create  public/javascripts/controls.js
      create  public/javascripts/application.js
      create  doc/README_FOR_APP
      create  log/server.log
      create  log/production.log
      create  log/development.log
      create  log/test.log
$ cd newproject/
/home/jarl/tmp/newproject
$ ./script/about
About your application's environment
Ruby version              1.8.7 (x86_64-linux)
RubyGems version          1.3.5
Rack version              1.0
Rails version             2.3.5
Active Record version     2.3.5
Active Resource version   2.3.5
Action Mailer version     2.3.5
Active Support version    2.3.5
Application root          /home/jarl/tmp/newproject
Environment               development
Database adapter          sqlite3
Database schema version   0
$ ./script/generate scaffold test
      exists  app/models/
      exists  app/controllers/
      exists  app/helpers/
      create  app/views/tests
      exists  app/views/layouts/
      exists  test/functional/
      exists  test/unit/
      create  test/unit/helpers/
      exists  public/stylesheets/
      create  app/views/tests/index.html.erb
      create  app/views/tests/show.html.erb
      create  app/views/tests/new.html.erb
      create  app/views/tests/edit.html.erb
      create  app/views/layouts/tests.html.erb
      create  public/stylesheets/scaffold.css
      create  app/controllers/tests_controller.rb
      create  test/functional/tests_controller_test.rb
      create  app/helpers/tests_helper.rb
      create  test/unit/helpers/tests_helper_test.rb
       route  map.resources :tests
  dependency  model
      exists    app/models/
      exists    test/unit/
      exists    test/fixtures/
      create    app/models/test.rb
      create    test/unit/test_test.rb
      create    test/fixtures/tests.yml
      create    db/migrate
      create    db/migrate/20100510080045_create_tests.rb
$ grep 'cache' config/environments/development.rb
config.cache_classes = false
$ ./script/console
Loading development environment (Rails 2.3.5)
>> app.get '/tests/'
=> 500
>> app.get '/tests/'
ThreadError: thread 0x7f9dc864b370 tried to join itself
        from /var/lib/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/reloader.rb:31:in `lock'
        from /var/lib/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/reloader.rb:31:in `run'
        from /var/lib/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:108:in `call'
        from /var/lib/gems/1.8/gems/rack-1.0.1/lib/rack/lint.rb:47:in `_call'
        from /var/lib/gems/1.8/gems/rack-1.0.1/lib/rack/lint.rb:35:in `call'
        from /var/lib/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/integration.rb:316:in `process'
        from /var/lib/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/integration.rb:197:in `get'
        from (irb):2

I have verified that this also fails in 2.3.4, but everything is fine in 2.3.3

Jarl