I am using the open source version of DSC. I have just noticed that trying to get to the Checkout page from the view cart page whilst using IE10 does not work and returns back to the cart page. All other browsers work as does IE9 and 8.Anyone have any ideas?

Do you have a url that I can take a look?

It's probably IE10. On Windows7 the web site doesn't show the checkout page, on Windows8 it does but some Javascript features stop working instead. IE10 in compatability mode still doesn't work. Go to http://www.gasequipmentdirect.co.uk, choose the topmost top seller on left, click 'add to cart' on right, then 'view cart' on right, then 'proceed to checkout' on right. It should display the checkout but seems to revert back to the cart summary. I cannot see anything in code that would appear to cause the issue.