Using Mechanize with Google Docs

Question

I'm trying to use Mechanize login to Google Docs so that I can scrape something (not possible from the API) but I keep seem to keep getting a 404 when trying to follow the meta redirect:

require 'rubygems'
require 'mechanize'

USERNAME = "..."
PASSWORD = "..."

LOGIN_URL = "https://www.google.com/accounts/Login?hl=en&continue=http://docs.google.com/"

agent = Mechanize.new
login_page = agent.get(LOGIN_URL)
login_form = login_page.forms.first
login_form.Email = USERNAME
login_form.Passwd = PASSWORD
login_response_page = agent.submit(login_form)

redirect = login_response_page.meta[0].uri.to_s

puts "redirect: #{redirect}"

followed_page = agent.get(redirect) # throws a HTTPNotFound exception

pp followed_page

Can anyone see why this isn't working?