I think we should petition to have the amounts of karma added each time shown on the CP page.. at least then we could try to guess who it was...
I don't think it was me though
stu, I gave whole lots of random karma last night to try to get through the same-person-again block, but none of those look familiar, I'm sure I didn't write anything that would have taken more than a couple of seconds..
If you did notice though that you'd got a new comment but your total didn't seem to change, that was probably me..