I have this test from michael hartl book:
require \'spec_helper\' describe \"Static pages\" do let(:base_title) { \"Ruby on Rails Tutorial Sample App\"
I've been using the following and they have been posting green. I dropped have_selector and went with have_title.
it { should have_title( full_title('Sign up') ) }
-- and --
it { should have_title(user.name) }
This is with capybara 2.2.0.