Do we still want 1.8.7 compatibility for Capybara 2?

There's a slew of failures on http://travis-ci.org/#!/jnicklas/capybara/jobs/2013383, and I can reproduce it on my rbenv with 1.8.7-p357.

I'm not sure where it's going wrong. Perhaps even some other gem (RSpec?) that's not playing nice with 1.8.7? Since we don't have Gemfile.lock checked in, it might have started to happen without us doing anything.

Right now I don't have time to track it down, but I figured I'd at least file an issue.