Didn't expect you to. But I also have a QNAP NAS, which essentially runs Linux RAID (I think?). I was wondering if this will automatically align the new 4K drive correctly and make it play happily with the other 512b drives?

Edit: partial answer found here. It seems Windows from Vista and up is ok (most of the time ), but XP can be troublesome. Windows Home Server, which is based on Windows 2003 server, the XP stack essentially, has problems. This will probably be fixed with the new Windows Home Server "Vail" which is due by the end of this year since that version is based on Windows 2008 server.

It seems the only system that flawlessly recognises these new drives and automatically aligns the partitions correctly is Linux. So no surprises there.