Ardco, thanks for your reply; the message is not a popup, it does appear in the terminal. It's not a local problem, since I don't get the message when I'm not logged on via SSH, however, when I reconnect, my screen session is dead. It also happens when I'm logged on, but when I'm logged on, I do get the 'dungeon' message, and then the session is killed immediately. I'm dropped into a 'blank' shell, basically a shell that doesn't accept any commands.
Nathan, I'm having trouble when I'm logged on via SSH, it doesn't have anything to do with SSL. I know that the Dreamhost server go down sometimes for maintenance, but this problem doesn't seem to be maintenance related; the uptime for snapple is 8+ days. It's possible that the SSH server process itself is restarted on a regular basis, but that doesn't explain the mysterious message that I get, and I can't think of a good reason to restart the SSH server regularly, unless maybe some other user is doing something that's causing a problem.
I will definetely e-mail support if no one else on the forum knows what this could be, but I have another request with them open right now that is more pressing (see my post "Wordpress..."), so once that's resolved, I'll have them look at it.
Again, anyone who may have an idea what this could mean, please let me know, I don't want to open a support ticket unless I absolutely have to.