Since my MP3 player seems to ignore the disc number tag
It would be nice if there was an option to convert
Disc 1 Track 1 ... Disc 1 Track (n), Disc 2 Track 1 ... Disc 2 Track (m), Disc 3 Track 1 ...
Track 1 ... Track n, Track (n+1) ... Track (n+m), Track (n+m+1) ...
for any multi-disc albums when synchronising, but to preserve the original details in the library.
It'd also be handy to have this option under Convert Format too. (That's how I have to sync with my own audio player, because it doesn't preserve Last Modified dates.)