Harry Potter IV comes out tomorrow (or tonight, if you go to a midnight showing). It's rated PG-13, which to me, always means it's violent or scary or disturbing. I think in most cases I find PG-13 movies scarier than those rated R. I'm not quite sure why, maybe it's because PG-13 movies are targeted towards younger audiences, and so when bad things happen to the (usually younger) characters, I just cringe, and maybe that's why PG-13 movies are so much more traumatic for me.
Well, I'm not surprised that the Goblet of Fire received a PG-13 rating. The book version of HP and the Prisoner of Azkaban was the turning point of the series from innocent and cheerful to dark, sinister and more grown-up. From then onwards, I think Books 4-6 are a bit too dark and mature for very young children. =/