[Bug 790236] Re: upgrade to 11.04 stops with error "W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/natty/Release Unable to find expected entry universe/binary-amd64/Packages in Meta-index file (malformed Release file?) , E:Some index files failed to download, they have been ignored, or old ones used instead."

[Jean-Baptiste Lallement]

Thanks for the file.

This repositories doesn't exist:
#Third party developers repository
deb http://extras.ubuntu.com/ubuntu maverick main universe
deb http://extras.ubuntu.com/ubuntu maverick main multiverse

Please remove them from your sources list and try to update again. I'm
closing this report because it is not a bug with Ubuntu.

** Changed in: update-manager (Ubuntu)
       Status: Incomplete => Invalid

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https://bugs.launchpad.net/bugs/790236

Title:
  upgrade to 11.04 stops with error "W:Failed to fetch
  http://extras.ubuntu.com/ubuntu/dists/natty/Release  Unable to find
  expected entry  universe/binary-amd64/Packages in Meta-index file
  (malformed Release file?) , E:Some index files failed to download,
  they have been ignored, or old ones used instead."

Status in “update-manager” package in Ubuntu:
  Invalid

Bug description:
  Binary package hint: update-manager

  W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/natty/Release  Unable to find expected entry  universe/binary-amd64/Packages in Meta-index file (malformed Release file?)
  , E:Some index files failed to download, they have been ignored, or old ones used instead.