I did have an incident though.
From Tueday to Saturday when I tried to login, I was on vacation and did not bring in my mail from the server. When I logged into the mail, it said trhe disk was full. I had to use pine to delete the thousands of mails from the server to allow my mail client to bring it in... and ... to let the server operate. Perhaps, that is what happened. Everything was fine before then.
If the GF has to write to a file, the disk was full and would not allow it? But now that the server is OK, the GF is broken.