~/www $ wget http://wordpress.org/latest.tar.gz
--14:16:37--  http://wordpress.org/latest.tar.gz
           => `latest.tar.gz'
Resolving wordpress.org... 72.233.56.139, 72.233.56.138
Connecting to wordpress.org|72.233.56.139|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [application/octet-stream]

    [                  <=>                ] 3,502,080    992.54K/s

14:16:41 (903.14 KB/s) - `latest.tar.gz' saved [3502080]

~/www $ file latest.tar.gz
latest.tar.gz: POSIX tar archive
~/www $ tar zxvf latest.tar.gz

gzip: stdin: not in gzip format
tar: Child returned status 1
tar: Error exit delayed from previous errors