1) Is Bella the only one affected by the Cullens leaving? How has "nothing changed" in their absence?
Probably not. I can imagine the hospital has been affected with Carlisle leaving and that also affects the people of Forks. Then all the girls in the school who must've had a crush on one of the Cullen boys have to have been affected too, right? Maybe they didn't say it out loud, but I can imagine that they were slightly disappointed when they left.
But then of course, since the Cullens were rather on their own, everyone's lifes just went on without a real change in actions because the Cullens were never an active part of it.2) Why is the dream different than before? Did Bella's renewed contact with Jacob's family change her perception of Sam Uley? How so and why?
I don't know. I think it would've been irrelevant to the book if Bella would've dreamt of pink bunnies so I just think it's something Stephenie Meyer put in there, you know, to give us a clue.3) Why would Bella not want to be invisible now, when she wanted to be invisible last year?
I don't think she ever wants to be visible.4) How is Charlie affected by this new Bella? Does he perceive how much of it is Jacob's doing?
Yeah, I think he's well aware of the fact that it's all part of Jacob's doing. Seeing Bella happy makes Charlie happy so I guess that's why he supports her contact with Jake that much.5) This is the second mention of the monstrous black bear. Did you realize at this point that there was more to it than that? What did you think was going on? Did you think it would turn into what it did?
Not really. I just thought that the bear would become a part of the story. Something like Bella almost being eaten by the bear and maybe Edward coming over to save her from it. (I was still convinced he was out there somewhere, lurking.)