After being notified by one visitor, I realized that there was a problem in Coret Moret. The POST mechanism for previewing and sending comment is failed and No entry_id found error message returned. Because I only tested this from inside firewall, I just assumed that anything was okay. Until 3 October...

Having bug hunting and finishing all for two days (not full time, folks!), I write small documentation in Coret Moret (Bahasa Indonesia). Now the comment box is ready to accomodate visitors' feedback.