I'm using rails 2.3.2 + authlogic + smerf. I've got an application that seems to work properly in development environment, but in production it crashes whenever an engine class from the plugin is used (under app/models at least). Source is available here if useful:

git://assembly.cornell.edu/git/survey.git

Errors thrown in production are of the sort reproduced below. I'm guessing it's something about the engines + rack implementation of rails 2.3.2, but haven't got a sense of where to look for the specific cause.

Processing UsersController#profile (for 67.241.40.99 at 2009-07-18 23:18:39) [GET]
Parameters: {"action"=>"profile", "controller"=>"users"} Rendering template within layouts/users
Rendering users/profile

ActionView::TemplateError (uninitialized constant User::SmerfFormsUser) on line #6 of app/views/users/profile.html.erb:
3:

Available Surveys

6: <% @user.smerf_forms.not_started.each do |form| %>
7:
• <%= link_to(form.name, smerf_form_url(form.code)) %>

8: <% end %>
9:

app/views/users/profile.html.erb:6
app/controllers/users_controller.rb:20:in `profile'
passenger (2.2.4) lib/phusion_passenger/rack/request_handler.rb:91:in `process_request'
passenger (2.2.4) lib/phusion_passenger/abstract_request_handler.rb:206:in `main_loop'
passenger (2.2.4) lib/phusion_passenger/railz/application_spawner.rb:376:in `start_request_handler'
passenger (2.2.4) lib/phusion_passenger/railz/application_spawner.rb:334:in `handle_spawn_application'
passenger (2.2.4) lib/phusion_passenger/utils.rb:182:in `safe_fork'
passenger (2.2.4) lib/phusion_passenger/railz/application_spawner.rb:332:in `handle_spawn_application'
passenger (2.2.4) lib/phusion_passenger/abstract_server.rb:351:in `__send__'
passenger (2.2.4) lib/phusion_passenger/abstract_server.rb:351:in `main_loop'
passenger (2.2.4) lib/phusion_passenger/abstract_server.rb:195:in `start_synchronously'
passenger (2.2.4) lib/phusion_passenger/abstract_server.rb:162:in `start'
passenger (2.2.4) lib/phusion_passenger/railz/application_spawner.rb:213:in `start'
passenger (2.2.4) lib/phusion_passenger/spawn_manager.rb:261:in `spawn_rails_application'
passenger (2.2.4) lib/phusion_passenger/abstract_server_collection.rb:126:in `lookup_or_add'
passenger (2.2.4) lib/phusion_passenger/spawn_manager.rb:255:in `spawn_rails_application'
passenger (2.2.4) lib/phusion_passenger/abstract_server_collection.rb:80:in `synchronize'
passenger (2.2.4) lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'
passenger (2.2.4) lib/phusion_passenger/spawn_manager.rb:254:in `spawn_rails_application'
passenger (2.2.4) lib/phusion_passenger/spawn_manager.rb:153:in `spawn_application'
passenger (2.2.4) lib/phusion_passenger/spawn_manager.rb:286:in `handle_spawn_application'
passenger (2.2.4) lib/phusion_passenger/abstract_server.rb:351:in `__send__'
passenger (2.2.4) lib/phusion_passenger/abstract_server.rb:351:in `main_loop'
passenger (2.2.4) lib/phusion_passenger/abstract_server.rb:195:in `start_synchronously'

Rendering /var/www/assembly/survey/releases/20090719031211/public/500.html (500 Internal Server Error)