Autoblog zip file fails to unzip


I just downloaded autoblog from:

When I try to unzip/ extract it I get this error:

Archive: /home/josef/
End-of-central-directory signature not found. Either this file is not
a zipfile, or it constitutes one disk of a multi-part archive. In the
latter case the central directory and zipfile comment will be found on
the last disk(s) of this archive.
zipinfo: cannot find zipfile directory in one of /home/josef/ or
/home/josef/, and cannot find /home/josef/, period.

Any ideas?