found this article on BBC:

http://news.bbc.co.uk/2/hi/technology/7136069.stm

Red

This will bite Western Digital hard. They are blocking certain file types from being "served" on hard drives whose large size implies their best use is as a server, local or otherwise. Nobody I know is going to buy one of these drives.

How pissed will less educated customers be when they can't access certain files on these drives over their home network?