Was pleasantly suprised by this film, it could have been far, far worse.
I thought Smith's character was faithful to some of those created by Asimov; an honest, smart, distrustful, noisemaker, strong in his principles & convictions.
Initially my thoughts were that they screwed with the 3 laws, but then recalled that there are four.
It's fuzzy, but I seem to recall Asimov did have a robot hurt a human, can't remember his name offhand, but it was a President that Susan Calvin was conviced wasn't human. I think this was the first time he introduced the concept of actual harm vs "the greater good"