rack-oauth raises 401, causes a 500

gistfile1.txt

/!\ FAILSAFE /!\  Fri Jun 24 08:28:50 -0700 2011
  Status: 500 Internal Server Error
  401 Unauthorized
    /Users/davidamcclain/.gem/ruby/1.8/gems/oauth-0.4.4/lib/oauth/consumer.rb:217:in `token_request'
    /Users/davidamcclain/.gem/ruby/1.8/gems/oauth-0.4.4/lib/oauth/tokens/request_token.rb:18:in `get_access_token'
    /Users/davidamcclain/.gem/ruby/1.8/gems/rack-oauth-0.1.5/lib/rack-oauth.rb:213:in `do_callback'
    /Users/davidamcclain/.gem/ruby/1.8/gems/rack-oauth-0.1.5/lib/rack-oauth.rb:188:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/string_coercion.rb:25:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/head.rb:9:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/methodoverride.rb:24:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/params_parser.rb:15:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/session/abstract_store.rb:122:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:29:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/query_cache.rb:34:in `cache'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:9:in `cache'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:28:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/failsafe.rb:26:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in `synchronize'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in `call'
    /Volumes/WorkDrive/development/work/locamo/locomo/vendor/plugins/refraction/lib/refraction.rb:121:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:114:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/reloader.rb:34:in `run'
    /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:108:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/rack/static.rb:31:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/urlmap.rb:46:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/urlmap.rb:40:in `each'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/urlmap.rb:40:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/rack/log_tailer.rb:17:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/content_length.rb:13:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/handler/webrick.rb:50:in `service'
    /usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
    /usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
    /usr/local/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
    /usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start'
    /usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
    /usr/local/lib/ruby/1.8/webrick/server.rb:95:in `start'
    /usr/local/lib/ruby/1.8/webrick/server.rb:92:in `each'
    /usr/local/lib/ruby/1.8/webrick/server.rb:92:in `start'
    /usr/local/lib/ruby/1.8/webrick/server.rb:23:in `start'
    /usr/local/lib/ruby/1.8/webrick/server.rb:82:in `start'
    /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/handler/webrick.rb:14:in `run'
    /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/commands/server.rb:111
    /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
    /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
    script/server:3