gzip: stdin: not in gzip format
Err http://us.archive.ubuntu.com edgy/main Sources
  Sub-process gzip returned an error code (1)
Fetched 7B in 4s (2B/s)
Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/edgy/main/source/Sources.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.