postgresql-7.2b5.tar.gz

I just downloaded postgresql-7.2b5.tar.gz from 
http://developer.postgresql.org/beta.php. It seems the file is actually 
not gzipped, just tarred.

-rwxr--r--    1 root     cvs      37734400 Jan 18 11:22 
postgresql-7.2b5.tar.gz

# tar -xzvf postgresql-7.2b5.tar.gz

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


Joe