A word of warning to anyone who receives a Kinect game in advance of the official release date - trying to boot it up could leave you unable to access Xbox Live.
The problem was spotted by Joystiq. Apparently when playing the new discs you're asked to download an update, but you won't be able to do so - and that will mean you can no longer sign in to Live.
"Due to a retailer error, a very small number of customers were shipped copies of a Kinect game ahead of launch," Microsoft said in a statement.
"Since Kinect does not launch until Nov. 4 in the United States, customers who insert the game into their console before then will be temporarily unable to access Xbox Live. The retailer is contacting affected individuals directly to warn them of this situation."
Kinect isn't out in Europe till 10th November, and there's no word on whether similar problems are likely here. Probably better to be safe than sorry though eh.