One of the last episodes of Vicar of Dibley had music altered - I recorded it off TV here in NZ but accidentally cut the end off. I then downloaded a torrent of a broadcast from another country (possibly UK but I can't say for sure) and the music was different in one particular scene (NZ broadcast had Keane's "Somewhere Only We Know" and the overseas one was a different song that I didn't recognise).

I ended up buying the UK DVDs and they match the NZ broadcast, but I still don't know which song is "correct" (ie. which was present for the original UK broadcast).