Something else I noticed the other day while hopping on for a few minutes - when I checked "new posts", several threads indicated zero replies - but when I clicked on it, there were several replies. Furthermore, the post counts (of the OP at least, didn't check the regular members) did not increase in those threads.

An example can be found by searching for user "splee". It shows two threads - the first looks normal, and that user posted five times. The latest indicates zero replies (though there are several replies on the thread) and that users post count remains at five.