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.
This seems to be right, we have a bug or an against-the-rules workaround has been used. As AdeleneDawner notes, there is a number of comments with zero Karma and 2 posts in main section, with 9 and 7 upvotes, which contribute 160 Karma points, which is exactly calcsam's total Karma. This means that there should've been no possibility to make these posts (or even a discussion post, which requires 1 Karma point).
So either the publication requirement is broken (at least for calcsam's account), or one of the admins facilitated the publication in some way, or calcsam somehow first added 20 points to some of the comments (using other accounts), then published the posts, and then subtracted the points (the subtraction part is entirely too complicated, but given that the posts give a bit of publicity to the Mormon cult, not out of the question, assuming for example that motivation for that strange action comes from the idea that it's possible to track active upvotes).