[Bug 793586] [NEW] update-manager fails with E:Encountered a section with no Package: header'

[Adalberto]

Public bug reported:

Binary package hint: update-manager

Upon launhing update-manager GUI, it fails with 'E:Encountered a section with no Package: header, E:Problem with MergeList /var/lib/apt/lists/it.archive.ubuntu.com_ubuntu_dists_natty_main_binary-i386_Packages, E:L'elenco dei pacchetti o il file di stato non può essere letto o aperto.'
The last message is localised, so I'll translate it in english here: 'E:Package list or state file cannot be opened or read".
This same message shows at the end of "apt-get update" downloading process.
I've just updated to natty 11.04 via update-manager a few days ago.

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/793586

Title:
  update-manager fails with E:Encountered a section with no Package:
  header'

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

Bug description:
  Binary package hint: update-manager

  Upon launhing update-manager GUI, it fails with 'E:Encountered a section with no Package: header, E:Problem with MergeList /var/lib/apt/lists/it.archive.ubuntu.com_ubuntu_dists_natty_main_binary-i386_Packages, E:L'elenco dei pacchetti o il file di stato non può essere letto o aperto.'
  The last message is localised, so I'll translate it in english here: 'E:Package list or state file cannot be opened or read".
  This same message shows at the end of "apt-get update" downloading process.
  I've just updated to natty 11.04 via update-manager a few days ago.