Rails - Oct 2013 - getting selenium working with jruby/sinatra/cucumber/webrat on windows

I am trying to run cucumber/webrat with Sinatra on Jruby 1.7.3 (1.9.3) on 
Windows.
It seems to work ok, but when I try to add selenium to webrat. I get the 
error shown below.
It seems like it thinks it is in a linux environment or something as the 
error happens when it tries to start selenium server and there is a
"&" at
the end of the argument chain. I took a look at capybara but had some other 
similar incomprehensible problem there where the stack dump seemed to go on 
for ever until it ran out of memory. I just want a way to test the 
javascript aspects of the sinatra server content.

features/support/env.rb

    ENV[''RACK_ENV''] = ''test''

    require ''rubygems''
    require ''rack/test''
    require ''rspec/expectations''
    require ''webrat''
    require "selenium/client"

    require File.join(File.dirname(__FILE__), ''../../'',
''main.rb'')

 
    Webrat.configure do |config|
    # config.mode = :rack
      config.mode = :selenium
      config.application_port = 4567
      config.application_framework = :sinatra
    end

    class WebratMixinExample
      include Rack::Test::Methods
      include Webrat::Methods
      include Webrat::Matchers

      Webrat::Methods.delegate_to_session :response_code, :response_body

      def app
        # Sinatra::Application
        Main      
      end
    end

    World{WebratMixinExample.new}
    
===================================
> When I run cucumber I get
>unrecognized argument &:
Usage: java -jar selenium-server.jar [-interactive] [options]

-port <nnnn>: the port number the selenium server should use
(default 4444)
-timeout <nnnn>: an integer number of seconds before we should give
up
-interactive: puts you into interactive mode.  See the tutorial for
more details
...
...

Exception: java.lang.ThreadDeath thrown from the UncaughtExceptionHandler 
in thr
ead "Thread-8"
    ←[31mGiven I am viewing the admin page←[90m # 
features/simple_example.rb:6←[
0m←[0m
←[31m      Error while running >>java -jar 
"c:/jruby-1.7.3/lib/ruby/gems/shared/
gems/webrat-0.7.3/vendor/selenium-server.jar" -port 4444 -timeout 5
&<<
(Runtime
Error)←[0m



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