When I replied in the following forum, I noticed that the editor had changed. When I used a bulleted list additional lines appeared in the posted reply. I tried editing it to remove them but they returned.
http://www.geekzone.co.nz/forums.asp?forumid=141&topicid=124676&page_no=1#856334
Edit: I was using Firefox 22.0 in Windows 8.
Also found that I have to edit source code to add text before a link starting the post and after a link ending a post.