Sirius obviously called Harry "James" as a Freudiam slip because he missed James and saw him in Harry as they fought together.
I didn't like the movie very much, but my daughter loved it and judging from the reviews it will be a big hit.
They put Kreacher in it but he didn't do anything other than reveal his character.
The one thing they did right was rehabilitate Dumbledore into a grand wizard, after making him a total nuisance in the last film.
Ginny is a very skilled witch evidenced by how JKR describes her in the book. At age 6 she started taking her brothers' brooms out for flying lessons. By her second year, she could conjure a singing Get Well Card for Harry. Somewhere between her third and fourth years, she learned the Bat-bogey hex, striking fear into Fred and George. At least in the movie, she seemed to have little trouble conjuring a patronus.
Is Gambon still doing his "angry Dumbledore" routine?
According to the USAToday article yesterday, Kreacher is the character that J.K. Rowling said to put back in. He obviously plays a role in the last book.