When I run rspec spec I get the following:
/usr/local/lib/ruby/gems/1.9.1/gems/rspec-rails-2.7.0/lib/rspec/rails/extensions/active_record/base.rb:26:in `
Why are you running rspec spec? The typical thing to run is rake spec.
Try bundle exec rspec spec or bundle exec rake spec.
If that doesn't work, try to see if something is wrong with the rest of your environment -- try bundle exec rails console and bundle exec rails server
Another thing to check, is there anything odd in .rspec in your project file, or ~/.rspec?