gzip: stdin: not in gzip format
Err http://us.archive.ubuntu.com feisty/multiverse Packages                    
  Sub-process gzip returned an error code (1)
Fetched 223kB in 1m21s (2732B/s)                                               
Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/feisty/multiverse/binary-i386/Packages.gz  Sub-process gzip returned an error code (1)
Reading package lists... Done
E: Some index files failed to download, they have been ignored, or old ones used instead.