They certainly were thorough with their error messages. I just had DG crash just as I was about to get a custom game going, I loaded back up and tried to log in again and it took a while (probably thought I was still connected) and when I get into custom game search again I see my own game still there.
Just for the hell of it, I try to get back in even though it's probably FUBAR'd and I get this :

Now that's not an error message I ever would have thought to prepare!