I purchased the retail version from amazon.co.uk and it duly arrived the next day in its lovely shiny metal case etc (woohoo!). Game installs and plays fine and I can access the CE content on galciv2.com using my serial. However, when I try to register that serial with Stardock Central so that I can get the updates it says that it is an invalid serial.
Any thoughts?
I can take photos of my jewel case and receipts if proof is needed....