I recently realized that my Creative SoundBlaster X-Fi doesn't seem to have any 3D sound support. So I started searching the web and found that if you have 4GB or more RAM, you won't get 3D sounds in XP64 (apparently it affect Vista also but since I don't use it I don't know). Later I found that Creative was actually actively blocking access to features of some cards in Vista and actually lying about the support. They say it's not possible but then some dude who called himself Daniel_K (no relation to me, the guy's in Brazil) actually enabled a bunch of the features. And what does this company do? They threaten him with legal actions - http://www.xbitlabs.com/news/multimedia/display/20080331221922_Creative_Technology_Threatens_SoundBlaster_Driver_Developer.html
That just means Creative has just lost another customer. You should read their forums, it's a flame fest there

The Creative moderators are even deleting and editing threads. How fun