Many of my classical playlists contain numbers, i.e. Piano Sonata No. 1, Piano Sonata No. 10. Right now the numerical ordering works like this:
1 10 2 3 4 5 6 7 8 9
as opposed to
1 2 3 4 5 6 7 8 9 10
I would have to put a 0 in front of all single-digit numbers to get the correct order, but these playlists are ported from iTunes where doing so is not necessary.