Erro ao adicionar "quote" no redmine

Instalei o redmine_0.8.7 no ubuntu 10.04 LTS.
Consigo adicionar “issues” mas quando pretendo actualizar (adicionar quotes) este dar um erro no servidor

[i]Internal error

An error occurred on the page you were trying to access.
If you continue to experience problems please contact your redMine administrator for assistance.

[/i]

e no ficheiro de logs aparece este erro

[code]

ArgumentError (invalid date):
/usr/local/lib/ruby/1.8/date.rb:752:in civil' /app/models/time_entry.rb:66:inspent_on=’
/vendor/rails/activerecord/lib/active_record/base.rb:2372:in send' /vendor/rails/activerecord/lib/active_record/base.rb:2372:inattributes=’
/vendor/rails/activerecord/lib/active_record/base.rb:2371:in each' /vendor/rails/activerecord/lib/active_record/base.rb:2371:inattributes=’
/vendor/rails/activerecord/lib/active_record/base.rb:2141:in initialize' /app/controllers/issues_controller.rb:185:innew’
/app/controllers/issues_controller.rb:185:in edit' /vendor/rails/actionpack/lib/action_controller/base.rb:1166:insend’
/vendor/rails/actionpack/lib/action_controller/base.rb:1166:in perform_action_without_filters' /vendor/rails/actionpack/lib/action_controller/filters.rb:579:incall_filters’
/vendor/rails/actionpack/lib/action_controller/filters.rb:572:in perform_action_without_benchmark' /vendor/rails/actionpack/lib/action_controller/benchmarking.rb:68:inperform_action_without_rescue’
/usr/local/lib/ruby/1.8/benchmark.rb:293:in measure' /vendor/rails/actionpack/lib/action_controller/benchmarking.rb:68:inperform_action_without_rescue’
/vendor/rails/actionpack/lib/action_controller/rescue.rb:201:in perform_action_without_caching' /vendor/rails/actionpack/lib/action_controller/caching/sql_cache.rb:13:inperform_action’
/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb:33:in cache' /vendor/rails/activerecord/lib/active_record/query_cache.rb:8:incache’
/vendor/rails/actionpack/lib/action_controller/caching/sql_cache.rb:12:in perform_action' /vendor/rails/actionpack/lib/action_controller/base.rb:529:insend’
/vendor/rails/actionpack/lib/action_controller/base.rb:529:in process_without_filters' /vendor/rails/actionpack/lib/action_controller/filters.rb:568:inprocess_without_session_management_support’
/vendor/rails/actionpack/lib/action_controller/session_management.rb:130:in process' /vendor/rails/actionpack/lib/action_controller/base.rb:389:inprocess’
/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:149:in handle_request' /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:107:indispatch’
/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:104:in synchronize' /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:104:indispatch’
/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:120:in dispatch_cgi' /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:35:indispatch’
/vendor/rails/railties/lib/webrick_server.rb:112:in handle_dispatch' /vendor/rails/railties/lib/webrick_server.rb:78:inservice’
/usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in service' /usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:inrun’
/usr/local/lib/ruby/1.8/webrick/server.rb:173:in start_thread' /usr/local/lib/ruby/1.8/webrick/server.rb:162:instart’
/usr/local/lib/ruby/1.8/webrick/server.rb:162:in start_thread' /usr/local/lib/ruby/1.8/webrick/server.rb:95:instart’
/usr/local/lib/ruby/1.8/webrick/server.rb:92:in each' /usr/local/lib/ruby/1.8/webrick/server.rb:92:instart’
/usr/local/lib/ruby/1.8/webrick/server.rb:23:in start' /usr/local/lib/ruby/1.8/webrick/server.rb:82:instart’
/vendor/rails/railties/lib/webrick_server.rb:62:in dispatch' /vendor/rails/railties/lib/commands/servers/webrick.rb:66 /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:ingem_original_require’
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in require' /vendor/rails/activesupport/lib/active_support/dependencies.rb:510:inrequire’
/vendor/rails/activesupport/lib/active_support/dependencies.rb:355:in new_constants_in' /vendor/rails/activesupport/lib/active_support/dependencies.rb:510:inrequire’
/vendor/rails/railties/lib/commands/server.rb:39
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in gem_original_require' /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:inrequire’
script/server:3

Rendering /opt/redmine-0.8.7/public/500.html (500 Internal Server Error)[/code]

Alguém que já teve este erro e saiba como resolve-lo ou alguém com alguma solução?

ainda sem soluções? :cry: