My iPhone and iPad refuse to transfer purchases to iTunes
I am able to backup my devices. I am able to sync my devices. I am able to transfer apps to my devices from iTunes.
I am NOT able to transfer purchases from my devices to iTunes. What do I need to do to resolve this? I've wasted over an hour of this morning trying to fix this already. My computer is authorised.
Various messages iTunes gives me, relating to this:
"An unknown error occurred (1660)"
"The iPhone "3GS" cannot be synced. An unknown error occurred (1159)."
"The iPad "ipad2" cannot be synced. An unknown error occurred (1159)."
iMac, Mac OS X (10.6.7)