I think this would bother me more if I knew the music well enough to begin with (other than the main theme), which I do not. Since I lack a reference point in this case, hearing something (e.g.) in B-flat rather than A -- or a perceivable number of cents +/- to that effect -- does not make a difference to me at this point. But perhaps you know the music well enough for it to matter.
Is there any way mechanically that you can slow it down? I know of no way at present.
I own two PAL region 2 DVDs, 'Bicentennial Man' and 'Glory'.
I purchased both discs from Amazon UK because of their isolated music score tracks, not available on their region 1 counterparts.
Because the isolated tracks were basically complete scores, I made CDs out of them, and in the case of 'Bicentennial Man', made a DTS 5.1 CD.
I had to take the Dolby AC3 tracks and convert them to WAV format, cue by cue, changing the sampling rate from 48000 Hz to 46033 Hz, then save the files as 44100Hz for CD use.
That changed the PAL speedup pitch without adding artifacts to the sound that a pitch shifting program would have.
Now that is too big a process to do an entire film's audio track, and the encoders out there that just pitch correct the audio compromise the sound quality too much. The same can be said for software DVD players that have a PAL "true speed" option.