I’ve got a similar problem but I cannot see the website which I could last nigth it was fine and today I get a 404 error from hostgator. So I try and go to the control panel and get another 404 not found!
Also I see now in the control panel on fantastico that two other WP installations show the WP edition (3.1) but now the website in question says “unknown” it was 3.1, so can someone expain what is happening it does seem like a WP issue rather than plugins and themes. The them is standard WP anyhow.
Bob