Redmine

When i try to access repository from redmine i get:

NoMethodError (undefined method `<=>' for nil:NilClass):
lib/redmine/scm/adapters/abstract_adapter.rb:218:in `sort_by_name'
lib/redmine/scm/adapters/abstract_adapter.rb:216:in `sort'
lib/redmine/scm/adapters/abstract_adapter.rb:216:in `sort_by_name'
lib/redmine/scm/adapters/mercurial_adapter.rb:101:in `entries'
app/models/repository/mercurial.rb:33:in `entries'
app/controllers/repositories_controller.rb:70:in `show'
passenger (2.2.5) lib/phusion_passenger/rack/request_handler.rb:95:in `process_request'
passenger (2.2.5) lib/phusion_passenger/abstract_request_handler.rb:207:in `main_loop'
passenger (2.2.5) lib/phusion_passenger/railz/application_spawner.rb:378:in `start_request_handler'
passenger (2.2.5) lib/phusion_passenger/railz/application_spawner.rb:336:in `handle_spawn_application'
passenger (2.2.5) lib/phusion_passenger/utils.rb:183:in `safe_fork'
passenger (2.2.5) lib/phusion_passenger/railz/application_spawner.rb:334:in `handle_spawn_application'
passenger (2.2.5) lib/phusion_passenger/abstract_server.rb:352:in `__send__'
passenger (2.2.5) lib/phusion_passenger/abstract_server.rb:352:in `main_loop'
passenger (2.2.5) lib/phusion_passenger/abstract_server.rb:196:in `start_synchronously'
passenger (2.2.5) lib/phusion_passenger/abstract_server.rb:163:in `start'
passenger (2.2.5) lib/phusion_passenger/railz/application_spawner.rb:213:in `start'
passenger (2.2.5) lib/phusion_passenger/spawn_manager.rb:262:in `spawn_rails_application'
passenger (2.2.5) lib/phusion_passenger/abstract_server_collection.rb:126:in `lookup_or_add'
passenger (2.2.5) lib/phusion_passenger/spawn_manager.rb:256:in `spawn_rails_application'
passenger (2.2.5) lib/phusion_passenger/abstract_server_collection.rb:80:in `synchronize'
passenger (2.2.5) lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'
passenger (2.2.5) lib/phusion_passenger/spawn_manager.rb:255:in `spawn_rails_application'
passenger (2.2.5) lib/phusion_passenger/spawn_manager.rb:154:in `spawn_application'
passenger (2.2.5) lib/phusion_passenger/spawn_manager.rb:287:in `handle_spawn_application'
passenger (2.2.5) lib/phusion_passenger/abstract_server.rb:352:in `__send__'
passenger (2.2.5) lib/phusion_passenger/abstract_server.rb:352:in `main_loop'
passenger (2.2.5) lib/phusion_passenger/abstract_server.rb:196:in `start_synchronously'

I create a new project, add repo (mercurial one). It first scans repo for a few minutes (repo directory have about 60mb and there's about 1k commits in history) and then that error shows in the log. I'm using svn redmine (latest version) and mercurial 1.3.1-r1.

Looking at the repo history there are some commits with strange names, using non-iso characters. Can it be a problem or is it something else?