I have the same problem. When I burn a DVD, Nero uses DVD uses the media posted speed: DVD-Rs in 8x and DVD-RW in 4x to do so. When I try to play the DVD on my computer or a brand new DVD player (friend's) it works. When I try it on my DVD player it does not. I know my DVD player can play DVD-R's and I checked a few of them; they were recorded at 2x speed. I figured I should try to burn my DVDs using 2x speed but no matter what I do Nero resets the speed at burn time and burns at the maximum speed allowed by the media.
Thanks in advance.