When I run cucumber...

Using the default profile...
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.3/lib/cucumber/platform.rb:8: warning: already initialized constant VERSION
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.3/lib/cucumber/platform.rb:9: warning: already initialized constant BINARY
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.3/lib/cucumber/platform.rb:10: warning: already initialized constant LIBDIR
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.3/lib/cucumber/platform.rb:11: warning: already initialized constant JRUBY
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.3/lib/cucumber/platform.rb:12: warning: already initialized constant IRONRUBY
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.3/lib/cucumber/platform.rb:13: warning: already initialized constant WINDOWS
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.3/lib/cucumber/platform.rb:14: warning: already initialized constant OS_X
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.3/lib/cucumber/platform.rb:15: warning: already initialized constant WINDOWS_MRI
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.3/lib/cucumber/platform.rb:16: warning: already initialized constant RAILS
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.3/lib/cucumber/platform.rb:17: warning: already initialized constant RUBY_BINARY
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.3/lib/cucumber/platform.rb:18: warning: already initialized constant RUBY_1_9
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.3/lib/cucumber/platform.rb:19: warning: already initialized constant RUBY_1_8_7
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.3/lib/cucumber/formatter/ansicolor.rb:68: warning: already initialized constant ALIASES
wrong number of arguments(1 for 3) (ArgumentError)
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/gherkin-2.1.5/lib/gherkin/parser/parser.rb:140:in `scan'
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/gherkin-2.1.5/lib/gherkin/parser/parser.rb:140:in `transition_table'
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/gherkin-2.1.5/lib/gherkin/parser/parser.rb:127:in `build_transition_map'
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/gherkin-2.1.5/lib/gherkin/parser/parser.rb:123:in `transition_map'
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/gherkin-2.1.5/lib/gherkin/parser/parser.rb:90:in `initialize'
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/gherkin-2.1.5/lib/gherkin/parser/parser.rb:67:in `new'
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/gherkin-2.1.5/lib/gherkin/parser/parser.rb:67:in `push_machine'
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/gherkin-2.1.5/lib/gherkin/parser/parser.rb:24:in `initialize'
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.5/lib/cucumber/feature_file.rb:33:in `new'
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.5/lib/cucumber/feature_file.rb:33:in `parse'
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.5/lib/cucumber/step_mother.rb:69:in `block in load_plain_text_features'
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.5/lib/cucumber/step_mother.rb:67:in `each'
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.5/lib/cucumber/step_mother.rb:67:in `load_plain_text_features'
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.5/lib/cucumber/cli/main.rb:55:in `execute!'
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.5/lib/cucumber/cli/main.rb:25:in `execute'
/home/steven/.rvm/gems/ruby-1.9.2-head/gems/cucumber-0.8.5/bin/cucumber:8:in `<top (required)>'
/home/steven/.rvm/gems/ruby-1.9.2-head/bin/cucumber:19:in `load'
/home/steven/.rvm/gems/ruby-1.9.2-head/bin/cucumber:19:in `<main>'

I'm having the same problem.

This is over a year old...

Yeah, I didn't check the date. I googled your gist with "warning: already initialized constant". I'm having the same problem, now. I think a cucumber update killed me. Sorry to bother you.