too many mistakes IMHO. I think he's just feeling the pressure to perform and it's stressing him out a little too much. Hopefully towards the end of the year he will feel much more comfortable in this offense and just play ball. He's got great talent, with him it's a mental issue.
that fumble in the raiders game is a perfect example. He's running down the field, he tries to switch the ball from one hand to the other (in order to deliver a stiff arm to the DB) and he just drops the ball. It's crap like this that makes people scream.