Debugging rspec in Netbeans

[Rich]

Hi. I can't seem to get debugging of rspec specs working in Netbeans.
AFAIK, I'm supposed to be able to just do Command+Shift+F5 with the
spec open in the editor but i get this error:

/Users/admin/src/expresso/vendor/plugins/rspec/lib/spec/test/unit/
autorunner.rb:2:in `remove_method': method `process_args' not defined
in Test::Unit::AutoRunner (NameError)
from /Users/admin/src/expresso/vendor/plugins/rspec/lib/spec/
test/unit/autorunner.rb:2
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/
custom_require.rb:27:in `gem_original_require'
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/
custom_require.rb:27:in `require'
from /usr/local/lib/ruby/gems/1.8/gems/
activesupport-1.4.2.7707/lib/active_support/dependencies.rb:496:in
`require'
from /usr/local/lib/ruby/gems/1.8/gems/
activesupport-1.4.2.7707/lib/active_support/dependencies.rb:342:in
`new_constants_in'
from /usr/local/lib/ruby/gems/1.8/gems/
activesupport-1.4.2.7707/lib/active_support/dependencies.rb:496:in
`require'
from /Users/admin/src/expresso/vendor/plugins/rspec/lib/spec/
test.rb:1
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/
custom_require.rb:27:in `gem_original_require'
... 56 levels...
from /usr/local/lib/ruby/gems/1.8/gems/ruby-debug-ide-0.1.8/
lib/ruby-debug.rb:79:in `main'
from /usr/local/lib/ruby/gems/1.8/gems/ruby-debug-ide-0.1.8/
bin/rdebug-ide:74
from /usr/local/bin/rdebug-ide:16:in `load'
from /usr/local/bin/rdebug-ide:16

Any ideas?