1) Harry is Voldemort's Horcrux, Voldemort is Harry's horcrux. The horcrux spell was prepared and that worked on Harry but it rebounded and made Voldemort a horrux as well. "You need to kill to make a horcrux". I hear you saying. Lily Potter died forHarry and that must count as death. That is why Voldemort discourages the death eaters from killing him, not because Voldemort wants to kill him, but so his vast amount of horcruxes stay intact.

2) R.A.B. is Regulus Black and the REAL Horcrux is the heavly locket found in Grimmauld Place (see HARRY POTTER and the Order of the Phoenix- The Noble and Most Ancient House of Black).

3) The last word is scar (at the moment).

4) Snape was acting on Dumbledore's orders when he killed him, so that Snape would not be killed because he had broken his unbreakable vow. He was lying to Voldemort when he claimed he was on the dark side and used Occlumency against him. He really is a spy. This is why Dumbledore's begging was so surreal to Harry, it was an act, yet Snape killed Dumbledore, so the Unbreakable Vow was not broken.

5) The portrait of Dumbledore in McGonagall's office wll play a key part in HP7.

I'm really interested particularly in your first theory that Voldemort and Harry are eachother's Horcruxes.

wow.

Never, I don't know why u always think as that. Remember when the Voldermort creat the Horcrux Harry wasn't born. I think he won't die.