I have experienced a few occasions where I had difficulty submitting a reply. It seems that the page gets one of these Internet Explorer messages about not finding the page selected (The heading is, "The Page Can Not Be Displayed".). It stays within the pop-up window. The thread page is not updated with the post. If I refresh the pop-up window, a page appears that looks like it is a page before the forums, showing links to my personal zone,HSBBW, the Member Directory, Help, and a list of the newest members.
It's frustrating, but I have never had to log back into the web site. Perhaps that is because I use the remember me option that uses cookie or something like that. After a couple of times, I remember to copy my input before I hit the Post Now button.
I attribute my difficulties to the military system that I sometimes use which has some strident blocking software running in the background and is also mighty slow. I have not noticed the problem with a different ISP that use when I am away from work. Then again, I have posted using two different military computers and the problem has been limited to one; and that has been only a handful of occurrences.
I hope this is helpful.