Don't save empty comments, or ones with "Type a comment here" as the text
Fixed: links from profile page
Revised: help sidebar on profile page
Improved: remove "no comments" message when comment is posted
Changed comment parsing: only recognize DCxxxx with four digits, so if punctuation follows it is not counted, and no links are made for placeholders such as "DC15xx". Unfortunately, @username functionality isn't present and isn't trivial.
Extended comments handling script so that table in discussion view can make use of it
Overhauled discussion page to update live from javascript