From time to time, my iPhone 3G (Syncing with Mac OS X 10.6.2, iTunes 9.0.2) starts returning an error (13019) every time it attempts to sync.
This problem can be consistently resolved by switching off music syncing, syncing the phone, and then switching music syncing on again (See http://support.apple.com/kb/TS2830), but then seems to reoccur (on average maybe ever week or so).
Is there any way to identify/resolve/work around whatever the underlying problem causing this issue to reoccur?