As you can see from the picture below, I have an extra two rep points today, not linked to any post. I have not accepted any answers today or done anything to warrant the points. I tried the rep recalc link recommended in this question, suitably adjusted to be for meta not SO. The 2 points don't show up there, and wouldn't add up to the total anyway, but it does appear in my profile and in the popup box that appears when you hover over your username.
Is there a reason this might have happened? Is it just a transient weird thing?