I tried to make a purchase. Moved an item from wishlist to cart, completed details on each screen, including credit card details, then pressed the button to make purchase. Next screen then said

"Form Validation Error:

You must be logged in to place an order. If you were previously logged in, your session may have expired. Please login and try your purchase again."

But the screen showed I was still logged in.
I logged out, logged in, but had same problem.
Frank