Ah ha
Seems to happen after I have played something from Firefly in iTunes. Fairly repeatable.
Also get lots of “unreadable meta code” entries in the log.
I will try avoiding iTunes for a few days see if that makes a difference.
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: daap.songalbumartist
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: daap.songcategory
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: daap.songextradata
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: daap.songcontentdescription
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: daap.songlongcontentdescription
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: daap.songkeywords
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: com.apple.itunes.is-podcast
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: com.apple.itunes.mediakind
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: com.apple.itunes.series-name
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: com.apple.itunes.network-name
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: com.apple.itunes.episode-num-str
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: com.apple.itunes.episode-sort
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: com.apple.itunes.season-num
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: daap.songgapless
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: com.apple.itunes.gapless-enc-del
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: com.apple.itunes.gapless-heur
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: com.apple.itunes.gapless-enc-dr
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: com.apple.itunes.gapless-dur
2007-10-24 09:05:37 (2fe085fb): Unknown meta code: com.apple.itunes.gapless-resy
2007-10-24 09:05:39 (2fe085fb): Unknown meta code: com.apple.itunes.is-podcast-playlist
2007-10-24 09:05:39 (2fe085fb): Unknown meta code: com.apple.itunes.special-playlist
2007-10-24 09:05:56 (e0e5bb1d): Session 0: Streaming file '10. Ain't It The Life.flac' to 192.168.2.2 (offset 0)
2007-10-24 09:05:58 (d2c172d7): Session 0: Streaming file '10. Ain't It The Life.flac' to 192.168.2.2 (offset 0)
2007-10-24 09:07:53 (2fe085fb): Thread 72: could not read: The operation completed The last entry is me turning iTunes off.