I have submitted a support request on the WordPress Support forums to help fix my blog’s issues with posting comments. Hopefully someone out there knows what to do to fix this problem!
Update: Just posted on the Kubrick support forum as well.
FIXED: Ok, I fixed the problem. Turns out, copying MT-Blacklist’s blacklist file and putting it into the Comment Moderation text box breaks comment posting. Interesting thing to know for the future. Maybe I should install