I ran Microsofts' Upgrade Assistant for Windows 8 to see if my printers, Wacom tablet, etc. would be compatible. The results report that my Datacolor Spyder 3 monitor calibrator "requires paid upgrade". I can't find anything on Datacolor's site about upgrading to Win 8 compatibility, other than just buying a new calibrator.
Has anyone with a Spyder 3 upgraded to Win 8 and confirmed that it will not work under Windows 8?