Both Chrome and Firefox fail with the same error message:
00:00:08.453 Scenario: Display simple math # features/math.feature:15 00:00:25.327 Given I am logged in # mediawiki_selenium-1.6.5/lib/mediawiki_selenium/step_definitions/login_steps.rb:1 00:00:25.327 And I am at page that does not exist # features/step_definitions/math_steps.rb:13 00:00:25.327 When I click link Create # features/step_definitions/math_steps.rb:17 00:00:25.327 And I type <math>3 + 2</math> # features/step_definitions/math_steps.rb:25 00:00:25.328 unable to locate element, using {:id=>"wpTextbox1", :tag_name=>"textarea"} (Watir::Exception::UnknownObjectException)