You might consider this post to contain spoilers, so if you haven't read the book, don't read on...
Okay, I'm confused, but that's to be expected after just finishing 870 pages. Dumbledore explains to Harry near the end of the book that he had been avoiding eye contact this whole time to protect himself from Voldemort, who might be able to possess Harry and see into Hogwarts at what Dumbledore was up to. Now, unless I am horribly delusional and terribly mistaken, wasn't there at least one instance during the book where the two did make eye contact, and Harry's scar burned? What's that all about?
Please just tell me if I'm stark raving mad and this never actually happened...but for some reason, I seem to remember it...