Comments and replies re-enabled
I finally found the problem that was causing the blog's comments to stop working. Apparently something is wrong with the built in anti-spam software that is causing the site to auto-delete every comment and return an error to the user. I'll be looking into this as time permits, but I happened to check the eventlog inside of Community Server and found a message that clued me into the real problem. I'll post more details here and in the CS forums if I learn anything else.