Several bugs have posted recently because users are having problems connecting to iTunes after updating from iTunes 9.x to 10.x.
The first time that iTunes is launched after a major update, the database is typically updated as well. This can take quite a while, depending upon the number of items in your database. Calibre can't connect to iTunes until this one-time database update is complete.
If you've just updated iTunes, follow these steps:
- exit calibre
- launch iTunes
- wait for the database update to complete
After the database update is complete, relaunch calibre. I've tested iTunes 10.x with the latest calibre release in both OSX and Windows, and everything works as expected after the update.
If you're having problems, review the first post in this thread before posting a bug report.
G