To be honest, I haven’t been very active on Stack Overflow in the last few weeks and I’ve only taken up the slack in the last few days. I’m therefore astonished to see (via the
/reputation link) that my reputation will go down by 578 points (from currently 64,668 to 64,090) with the next reputation recalc.
Since I haven’t done much since the last recalc (that I’m aware of), and the rules for reputation haven’t changed (or have they?) this doesn’t seem right.
I haven’t noticed any “unusual” votes that would be undone, haven’t deleted any high-scoring answers, and in any case more than 500 rep would seem excessive even then.
What other reasons for losing that much rep are there?
(I want to stress again that this is from after the great rep recalc, so the changing reputation gain for question upvotes has already been applied. What I’m seeing here is unrelated.)