title: Selenium/Magento - Sessionproblem during parallelisation
body: <p>I have a standard Magento webshop which I want to test in my grid. So I set up 3 virtual machines on a powerful VM-Server: Win7, XP and Ubuntu.
  If I run the test on a single machine to test the web shop everything works fine. It tests the basic checkout procedure (putting articles in the cart, enter customer data, order etc).
  AS soon as I start the test on the 3 machines with Selenium Grid 50 % of the tests fail because of sporadic errors which appear. This error appears anywhere during the checkout procedure an it says that the cart is empty although articles have been put into the cart. This never happens if I test on one machine.</p>
  
  <p>So, did anyone have similar experience? Anyone has a solution for this? I don't know what I am doing wrong.</p>