These chapters (43-46) seem to have several pieces of evidence for the "Harrymort" theory.
I just thought of another from an earlier chapter.
AND THE DARK LORD WILL MARK HIM AS HIS EQUAL
Equal, as in mathematical equality.
Also, from Ch. 45: "A strange word kept echoing in his mind." Probably 'horcrux'. [ETA: gjm's right. Missed that.]
I thought the strange word was "riddle".
Harry glanced in the Dementor's direction. The word echoed in his mind again. All right, Harry thought to himself, if the Dementor is a riddle, what is the answer?
Update: This post has also been superseded - new comments belong in the latest thread.
The second thread has now also exceeded 500 comments, so after 42 chapters of MoR it's time for a new thread.
From the first thread: