gem list | grep rspec

gareth-townsends-macbook-air:formtastic quamen$ gem list | grep rspec
dchelimsky-rspec (1.1.12, 1.1.11.6, 1.1.11.4, 1.1.11.3, 1.1.11.2)
rspec (1.1.12, 1.1.11)
rspec-rails (1.1.12, 1.1.11)
rspec_hpricot_matchers (1.0)

rake spec --trace

gareth-townsends-macbook-air:formtastic quamen$ rake spec --trace
(in /Users/quamen/Documents/Code/formtastic)
** Invoke spec (first_time)
** Execute spec
Example disabled: should mark input as checked if it's the the existing choice


Finished in 0.064284 seconds

0 examples, 0 failures
/Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `gem_original_require': no such file to load -- spec/mocks/argument_matchers (MissingSourceFile)
	from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require'
	from /Library/Ruby/Gems/1.8/gems/activesupport-2.3.0/lib/active_support/dependencies.rb:156:in `require'
	from /Library/Ruby/Gems/1.8/gems/activesupport-2.3.0/lib/active_support/dependencies.rb:521:in `new_constants_in'
	from /Library/Ruby/Gems/1.8/gems/activesupport-2.3.0/lib/active_support/dependencies.rb:156:in `require'
	from /Library/Ruby/Gems/1.8/gems/dchelimsky-rspec-1.1.12/lib/spec/mocks/framework.rb:6
	from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
	from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require'
	from /Library/Ruby/Gems/1.8/gems/activesupport-2.3.0/lib/active_support/dependencies.rb:156:in `require'
	 ... 18 levels...
	from /Library/Ruby/Gems/1.8/gems/dchelimsky-rspec-1.1.12/lib/spec/runner/example_group_runner.rb:22:in `run'
	from /Library/Ruby/Gems/1.8/gems/dchelimsky-rspec-1.1.12/lib/spec/runner/options.rb:111:in `run_examples'
	from /Library/Ruby/Gems/1.8/gems/dchelimsky-rspec-1.1.12/lib/spec/runner/command_line.rb:9:in `run'
	from /Library/Ruby/Gems/1.8/gems/dchelimsky-rspec-1.1.12/bin/spec:4
rake aborted!
Command /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby -I"/Library/Ruby/Gems/1.8/gems/dchelimsky-rspec-1.1.12/lib"  "/Library/Ruby/Gems/1.8/gems/dchelimsky-rspec-1.1.12/bin/spec" "spec/formtastic_spec.rb" -c failed
/Library/Ruby/Gems/1.8/gems/dchelimsky-rspec-1.1.12/lib/spec/rake/spectask.rb:175:in `define'
/Library/Ruby/Gems/1.8/gems/rake-0.8.3/lib/rake.rb:1090:in `verbose'
/Library/Ruby/Gems/1.8/gems/dchelimsky-rspec-1.1.12/lib/spec/rake/spectask.rb:151:in `define'
/Library/Ruby/Gems/1.8/gems/rake-0.8.3/lib/rake.rb:617:in `call'
/Library/Ruby/Gems/1.8/gems/rake-0.8.3/lib/rake.rb:617:in `execute'
/Library/Ruby/Gems/1.8/gems/rake-0.8.3/lib/rake.rb:612:in `each'
/Library/Ruby/Gems/1.8/gems/rake-0.8.3/lib/rake.rb:612:in `execute'
/Library/Ruby/Gems/1.8/gems/rake-0.8.3/lib/rake.rb:578:in `invoke_with_call_chain'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/Library/Ruby/Gems/1.8/gems/rake-0.8.3/lib/rake.rb:571:in `invoke_with_call_chain'
/Library/Ruby/Gems/1.8/gems/rake-0.8.3/lib/rake.rb:564:in `invoke'
/Library/Ruby/Gems/1.8/gems/rake-0.8.3/lib/rake.rb:2019:in `invoke_task'
/Library/Ruby/Gems/1.8/gems/rake-0.8.3/lib/rake.rb:1997:in `top_level'
/Library/Ruby/Gems/1.8/gems/rake-0.8.3/lib/rake.rb:1997:in `each'
/Library/Ruby/Gems/1.8/gems/rake-0.8.3/lib/rake.rb:1997:in `top_level'
/Library/Ruby/Gems/1.8/gems/rake-0.8.3/lib/rake.rb:2036:in `standard_exception_handling'
/Library/Ruby/Gems/1.8/gems/rake-0.8.3/lib/rake.rb:1991:in `top_level'
/Library/Ruby/Gems/1.8/gems/rake-0.8.3/lib/rake.rb:1970:in `run'
/Library/Ruby/Gems/1.8/gems/rake-0.8.3/lib/rake.rb:2036:in `standard_exception_handling'
/Library/Ruby/Gems/1.8/gems/rake-0.8.3/lib/rake.rb:1967:in `run'
/Library/Ruby/Gems/1.8/gems/rake-0.8.3/bin/rake:31
/usr/bin/rake:19:in `load'
/usr/bin/rake:19