Well, I found that it does this on the add-on drive for the 360, but only 1 other person reported (that I can find after wading around at AVS) it on their stand-alone players.
...I was just curious as some users said it only appeared 1 time on their players.
Word of warning XBox HD-DVD users--
On the 360 Add-on, you've got to be very careful to disable cookies or it may lock up on you on subsequent viewings. AVSforum threads confirm this--I ran into an unfortunately common freeze after an initial load and web-content download. You get a brief 'web update' screen each time you load the disc, but it only takes a few seconds. Just keep the cookies turned off/denied and you should be o.k.