Segregation was wrong when it was forced by white people, and I believe it is still wrong when it is requested by black people.
There's no subtext in Harry Potter really; it's all magic, anything can happen. Why do I say this? Because it's a magic spell. It's quite nice in a way. There is a real freedom to it.
Finally, I am encouraged to note that the Security Council issued a statement today expressing its concern about the massive humanitarian crisis in Darfur and calling on all parties to the conflict to protect civilians and reach a ceasefire.