… on posts older than 30 days. This is in a small effort to thwart the recent influx of comment spam I’ve been recieving. You haven’t seen much of it, because it gets captured by WordPress and held for moderation, but I would rather not have to moderate these large numbers of comments.
So a solution that I found over at Ensight is to basically turn off comments for posts older than a certain period of time. This generally works because most comment spam is on older posts, or ones that have been around a while and are worked into Google’s search results.
So we’ll see what happens.

did it work for you?
I couldn’t get it to work.
Yeah.. it has cut down my comment spam quite a bit. I still get some, but not nearly as much as I was. What kind of trouble are you having, maybe I can help?