According to my reputation report, my displayed reputation (4643) is 11 points too high over what it should be (4632). 10 of those points were an answer to a question posed by BalusC (10k only) which was a duplicate of this question. The last point just showed up... I think today, really.
No math makes sense for what's highlighted at the reputation FAQ. Because questions are worth 10 on Meta, the only sources of odd numbers in reputation are the casting of downvotes, the reception of half-bounties, and having an answer accepted. The only way for a positive gain on a downvote cast is to undo the vote, which is not something post deletion will cause discrepancy, so that isn't the source. I have not answered any bounty questions at all, nevermind gotten the specific kind that awards an odd number on a half-award.
It can't be from an accepted answer, though. That would imply that I received 7 downvotes to cancel the other 14 reputation. I don't recall having posted anything THAT unpopular, but more importantly it's unrealistic. All of the downvotes I knowingly have received I can account for on the report, and because of the scanning interval that tracks my reputation, it can only feasibly have occurred in the 4 hours I slept last night. This means 7 downvotes distributed across posts that had 0/0 score initially and were subsequently deleted all in the span of 4 hours, in addition to an accepted answer. Possible, yes... but it's way too unrealistic.
This isn't the first time I've seen this off-by-one-point, either. Shortly after my 2k recalc, I ended up with 36 extra reputation, 35 of which were from a +2/+0 accepted answer... leaving yet another mysterious +1.
So I can't make any sense of this. What can possibly grant a +1 reputation on Meta?
It should be noted that my displayed reputation this morning was the same as when I went to bed, 4622. And the extra +22/-1 since then, to reach 4643, I have recorded and observed personally, which means the +1 is not new, I actually lost an old point from long ago. So even further proof that accepted-answer-and-downvotes is unrealistic... but where did I get just +1 point?