Well, my attempt at stopping spam using a simple question on th ecomment entry page wasn't entirely successful. My activity log showed that a few attempts were made, but blocked by MT-Blacklist. None got through though, and it looks like there were a lot fewer attempts in the log than usual so it does seem to help. I wonder if they're bypassing the question somehow or if their bot is programmed to answer simple questions like that somehow. Or maybe they have some poor bastard in a third world country spamming me by hand.
My added field seems to have kinda screwed up my preview screen as well, I get an error at the bottom of the page. And it rejects any attempt to post from the preview screen as I don't have my test question on that page. Mmmm, not sure what file to edit to get it on there either.
Update: you can now post from the preview window, though I still get the error at the bottom of the page when I first load the preview page. I think I know what's causing it, too tired to fix it right now.
Update: found the solution here. Error gone, sleep now.