If I remember correctly, sprite backup is a great program because it backs up system files, that is, it is great when you want your phone to be exactly like it was before, but if you upgrade to a different version of software... I think that Sprite backup is overwriting some system files and therefore crashing the phone since there are 6.1 and 6.0 files mixed together. That's my reasoning.

There are 10 types of people in this world, those that understand binary and those who don't.