Speaking of karma, here's another Weird Thing: that reply seems to have had 2 points from the instant when it was first posted. Unless I hallucinated it, this suggests that comments' scores are not simply the sum of votes cast on them. [EDITED to add:] This one, too.
I thought that instead of everyone having to create a separate post for their first impressions, it would be more convenient to create a single post for this discussion. I'll post my own here soon.