A few times over the years, I've been interrupted while writing a post in the forum, have come back to it some time later, finished my contribution and hit "Preview" or "Post", only to be told that my session had timed out. The infuriating thing about such an incident is that everything that has been typed disappears, and there seems to be no way of recovering it.
Possibly I'm the only person who's been troubled by this phenomenon, because I can spend a fair while composing a reply to a word suggestion, with its associated research. Ironically, I'm also the person best able to do something about this, by changing the forum configuration. That's what I've finally gotten around to doing. So now you've got up to 10 hours to finish typing a forum post. Previously it was about 40 minutes.
(On a previous computer this wasn't such a problem, because I had a program running in the background that saved everything that was typed into a Web page form. But I don't have this handy program anymore, and can't remember what it was called. Does anyone know of such a thing?)