In the episode dalek when the dalek emerges from the lift to confront van statton, the daleks voice has been redubbed on the 5.1 mix and doesent have nearly the impact or depth as the origanal, you can compare it to the original by listeneing to it with the commentry on.

i know its really anal, but i watched the recording id taken from broadcast so many times that when i whatched it on dvd it struck me immedietly and it really bothers me now.

why have they done this ? the redub is so inferior