I am not certain that my "Server not Found" issue is the same thing. This has been an on and off problem for me for a couple weeks now. The most recent occurrence began yesterday at about 5:30PM. I had been online all day long with no problem then - all of a sudden - "server not found.
Same situation when I first logged on this morning. I finally shut everything down including my modem. Shutting down my modem forces and IP change if I leave it off for more than about 5 minutes.
Don't know that this actually had any effect but ... I am up and everything looks normal.
I guess this is a good thing. It keeps me busy and I am not doing anything that the doctor told me not to do.