title: Capybara/Cucumber/Ruby issue: Control+C close bowser session
body: <p>After update ruby and some gems version on my project, when I press control+c in a cucumber execution console, browser instance is totally closed....... when until now, console proccess was finished but the webdriver instance in the browser remains open and was interactive manually.....
  Where could be the problem? 
  Some ruby or cucumber environment gem? 
  Webdriver?
  Some hack to fix without roll back to all previous versions? 
  I´ve already tried to come back to previous ruby version but i still have the problem.</p>
  
  <p>Thanks.</p>