Blogger Hacked ...?

Just as I logged into blogger today, I found the blogger logo missing from the header of the dashboard. Instead of the Blogger logo, there was this half cropped image having 'Books' written on it. Have a look below.

What's this....?? Blogger hacked? I don't think so. Guess the logo has somehow been replaced with this weird image. The logo URL is http://www.blogger.com/img/logo40.gif but this now shows the 'Books' image. Google - look what's wrong.