I just added a comment to the entry on Troff::Parse, and got the response "Internal Server Error". Though when I went back, the comment was saved.
I get this too.
Network Error (tcp_error)
A communication error occurred: ""
The Web Server may be down, too busy, or experiencing other problems preventing it from responding to requests. You may wish to try again at a later time.
For assistance, contact your network support team.
I've seen examples of someone posting the same message about 8 times, I have to assume that they didn't realise that they were actually succeeding in posting their message.