I don't quite know what happened, but I settled down to watch a movie (recorded from sky+) on my new-ish 5.1 set up tonight and the speech was all coming out of the right hand surround speaker and not the centre. The centre seemed to be playing the part of one of the surround speakers. It hasn't done this before so I know it's not wired incorrectly, and when I'd finished watching the movie (through the tv speakers ) I put a sky movie channel on and everything was coming out of the correct speakers. Has anyone experienced this before? What's going on??