As I said, I tried setting it to manual mode, it then asks me to do this every time I plug it into a different computer. Manual mode either isn't sticking or no longer does what it is supposed to do on both my iPhone and iPod Touch. I don't sync either with a library, period, so the fact that it keeps telling me that I can only sync it with one library is nonsense.
Yup, that sounds familiar, sucks completely.