the only conclusion i can come to regarding the kid is that although clark and lois got together while he was human, perhaps his DNA was still kryptonian, and therefore his tadpoles were too.
in regards to the kid and the kryptonite, there could be several possibilities:
- due to the boy being half human, half kryptonian, he is immune
- or perhaps his molecular structure hasn't built up enough energy to be affected by it yet
bare in mind that although lois and clark got together, he
did make her forget it all... so i don't know what the go is there... perhaps as superman was flying away, she knew that the kid was his?
oh, and one smaller thing which annoyed me was the fact that you didn't get to see superman take care of luthor... but all that aside, it was a great movie. veyr worthy of the superman title it holds. kevin spacey was a perfect choice... oh, and i love the attention to detail: for example, in the scene where clark is talking with his mother in the living room, on the mantlepiece behind them, there is a picture of his father - mind you, it is a photo of glenn ford, the man who played jonathan kent in superman 1978.