I have done everything you instructed me to do, and it is still hung up after an hour of scanning. The last thing it says in the log is “(a000ed98): Scanned 2860 songs (was 2860) in 7 seconds,” and that was at 13:08:45. There has been no activity since then, and it is now 14:05:30, so it apparently scanned the iTunes DB. But it is still hung up.
Anything else I can do?