Rails1.2.1+GetText1.9.0で。

最新の組み合わせで、何故かActionWebServiceで組んだXML-RPC APIが動かなくなる。Rails1.1.6+GetText1.8.0なら大丈夫なので、どっちかの更新で引っかかったんだろうと思うけど。他の部分はちゃんと動いてるし、ブラウザからxmlrpc/invokeを叩いたときも正常動作するのが謎。
こういう時のログは見てもさっぱりなのが困る。小さいテストアプリケーション組んでみるしかないかな。
ログはこんな感じ。

Processing XmlrpcController#api (for 127.0.0.1 at 2007-01-24 00:19:00) [POST]
  Session ID: 7de54885f44c2449ae5ab1e978e01f8b
  Parameters: {"action"=>"api", "controller"=>"xmlrpc"}


NoMethodError (You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.[]):
    /opt/local/lib/ruby/1.8/cgi.rb:1164:in `[]'
    /opt/local/lib/ruby/gems/1.8/gems/gettext-1.9.0/lib/gettext/locale_cgi.rb:26:in `system'
    /opt/local/lib/ruby/gems/1.8/gems/gettext-1.9.0/lib/gettext/locale.rb:88:in `system'
    /opt/local/lib/ruby/gems/1.8/gems/gettext-1.9.0/lib/gettext/locale.rb:96:in `default'
    /opt/local/lib/ruby/gems/1.8/gems/gettext-1.9.0/lib/gettext.rb:293:in `set_locale_all'
    /opt/local/lib/ruby/gems/1.8/gems/gettext-1.9.0/lib/gettext/rails.rb:87:in `init_gettext_main'
    /opt/local/lib/ruby/gems/1.8/gems/gettext-1.9.0/lib/gettext/rails.rb:114:in `init_gettext'
    /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/filters.rb:456:in `send'
    /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/filters.rb:456:in `call'
    /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/filters.rb:435:in `call'
    /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/filters.rb:637:in `call_filter'
    /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/filters.rb:638:in `call_filter'
    /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/filters.rb:449:in `call'
    /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/filters.rb:637:in `call_filter'
    /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/filters.rb:619:in `perform_action_without_benchmark'
    /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/benchmarking.rb:66:in `perform_action_without_rescue'
    /opt/local/lib/ruby/1.8/benchmark.rb:293:in `measure'
    /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/benchmarking.rb:66:in `perform_action_without_rescue'
    /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/rescue.rb:83:in `perform_action'
    /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/base.rb:430:in `send'
    /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/base.rb:430:in `process_without_filters'
    /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/filters.rb:624:in `process_without_session_management_support'
    /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/session_management.rb:114:in `process'
    /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/base.rb:330:in `process'
    /opt/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/dispatcher.rb:41:in `dispatch'
    /opt/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/webrick_server.rb:113:in `handle_dispatch'
    /opt/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/webrick_server.rb:79:in `service'
    /opt/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
    /opt/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
    /opt/local/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
    /opt/local/lib/ruby/1.8/webrick/server.rb:162:in `start'
    /opt/local/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
    /opt/local/lib/ruby/1.8/webrick/server.rb:95:in `start'
    /opt/local/lib/ruby/1.8/webrick/server.rb:92:in `each'
    /opt/local/lib/ruby/1.8/webrick/server.rb:92:in `start'
    /opt/local/lib/ruby/1.8/webrick/server.rb:23:in `start'
    /opt/local/lib/ruby/1.8/webrick/server.rb:82:in `start'
    /opt/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/webrick_server.rb:63:in `dispatch'
    /opt/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/commands/servers/webrick.rb:59
    /opt/local/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'
    /opt/local/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:27:in `require'
    /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:496:in `require'
    /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:343:in `new_constants_in'
    /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:496:in `require'
    /opt/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/commands/server.rb:39
    /opt/local/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'
    /opt/local/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:27:in `require'
    /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:496:in `require'
    /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:343:in `new_constants_in'
    /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:496:in `require'
    ./script/server:3