These changes are for Ruby 1.8 / Capybara 2.0 issues with `.should_not` matchers. I haven't tracked down the cause yet, but capybara just [recently made the move to require 1.9+](https://github.com/jnicklas/capybara/commit/82e01429a0b189b9971eb4b843c1037d278a4aff), and these specs were passing on MRI 1.9.3 and JRuby, so I expect we can change these back once Forem requires 1.9+ as well.