The Faceblind View: Harry Potter and the Order of the Phoenix (in IMax 3D!): "Being such a huge Harry Potter fan, it's hard for me to tell how easy the characters of the latest installment would be to tell apart. I mean, I've read this book twice, I've seen all the other movies and read the books, and therefore I know what's going to happen. I know who should be doing what.
If this describes you too, you won't have any trouble with this movie. The one time I had even a speck of face trouble was a moment when Hermione was standing next to Harry in the room of requirement and she had her bushy hair pulled back. I didn't realize it was her until she talked. But it wasn't important to the plot."
Strangely enough, the one spot I remember having trouble identifying someone in the movie was nearly the same as the one Andrea had trouble with. Hermione was standing in the room of requirements, facing another student who was supposed to practice casting a spell on her. She had been in the room in a few different shots, but when I suddenly saw her alone standing opposite the other student, I didn't recognize that it was her. I asked G "who is that girl?". I did not realize why at the time, but I guess it must have been the hair?
Follow the link to Faceblind View to read the great description of all the characters, plus a review of the 3-D effects available when you see The Order of the Phoenix at an IMax theater. I especially recommend PA's read it before seeing the movie if they have not read the book.