calcsam has 20 karma that is not accounted for by any of his posts or comments. This means that he created an account, gathered twenty karma from comments, then deleted those comments. This probably means that he wanted to have a clean account with the ability to post ready, probably before he knew what he was going to do with it. (I keep a 20-karma, empty-history account in reserve myself. It's an obviously useful thing to have, when you think about it.)
(EDIT: Wait, no he doesn't. I was looking at the sidebar to count upvotes, but that has a bit of delay between updates that the karma bubble doesn't.)
Eliezer gave me Karma.
I just noticed that calcsam, who just posted two top posts in the main section of the site, only has the 100 karma that he has, so far, gained from those posts.
I don't object to those posts being there, but how did he do that?
Edit: Question answered; Eliezer mucked around with the karma system to make this possible in this specific case.