ron ive mailed you a zipped songs.db file and an email with some further details …
as requested .. heres my db file.
after further investigation i have deduced that this is a problem with the database/itunes server, not just its interaction with xbmc. as if i try to play these tunes in my PC Itunes client (6.0.5) these tunes also fail to start. (although unlike xmbc, itunes just stops dead, rather than moving on and playing the next playable file in the list).
The specific problem tunes are in the Classical playlist, anything with the album ‘The Mozart Collecxtion : Le nozze di Figaro (Highlights)’