Just use your ears; if you listen to the first few bars of the Star Wars theme music from each release it will be obvious if they are at different pitches.
Hi Moth3r! I don't agree here. It's not about the music.
I think you have to distinguish between the music/effects audio track and the dialogue track, that is mixed together later for the end product.
When synchronizing a movie only the dialogue track gets replaced.
The dialogue track can be thought of a bunch of voices, piece for piece, played at a specific timestamp.
The 24fps version plays the music/effects audio track at original speed, while the 25fps version plays the music/effects audio track with 104% speed.
Both of them get the dialogs mixed in at the specified timestamps, but the dialog track is always played at original speed!
Compare the german audio of any movie dvd with its bluray edition. Music/effects play faster but the voices are at the same frequencies!
The actors of Star Wars on DVD sound the same as on the upcoming Blurays.
We can compare the english voices on the UK DVD and the US DVD to see if I am right.
What does that all mean us?
As we only have the end product of the audio track the solution can't be slowing down the audio. My experience is the voices are correct as they are now on all PAL releases. If you want to fix the speed of the music/effects, you would have to have access to the production audio tracks.