Although iTunes 3.10 was made available to the public recently, Apple released a new version, making it too early, because apparently there is something wrong with the version above, and must be some serious matter because of pressure, even if Apple did not say, the fact is suspected that it was “unknown error (-50)” that some people experience when syncing your device.
As you recall, iTunes 10.3 arrived a few days with a new time “in the cloud, which allows us to obtain real-time synchronization with our purchase of the device at a time, up to 10 maximum in addition to downloading every time the purchase of our past, which includes only songs from iTunes, but also books and applications that are part of cloud service that comes with other additional benefits.