Since getting a Sky+ box I've noticed that programs, especially films seem to have the background noise and music much louder than the people talking, is there anything I can do about this either with the Sky+ box or settings on the TV?
Turn the Treble and Bass down, and the midrange up? Cant say I ever noticed that problem with Sky (Sky+, or HD). All depends how the sounds were mixed in the first place.
If your running with a digital AV amp and the digital connector, it could simply be that its not set up very well. Increasing the volume of the centre speaker should do the trick.