13. Thanks Tommy Boy!
When Harry was posessed by Voldemort in the department of mystries all powerblocks, blocks on centain abilities and physical blocks placed on him by dumbledore (optional) were broken (his magic was still recovering from the backslash when the scene in dumblies office occured or was the cause of the way his magic lashed out like that) and when he goes back to the Dursleys things start to happen (the ability to 'see' magic is always cool).
I know that there are some fics that have used the possesion thing as a way for Harry to gain all of (or at least a part of) Voldie's knowledge and I also know that there are a lot of fics that have the powerblock thing in their stories (I love those fics by the way) I do wonder why no one thought of this... I'm beginning to wonder that a lot lately...