[Bug 842179] [NEW] Short after upgrade, Synaptic failed to open but apt-get still works

[Tony Janssen]

Public bug reported:

Following screen pops up when opening synaptics (sudo) : application
will close when confirming dialog box

E: The value 'natty-proposed' is invalid for APT::Default-Release as such a release is not available in the sources
E: _cache->open() failed, please report.

Where can natty-proposed be disabled as default release, tried purging
several locations in older posts without success.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: synaptic 0.75.2ubuntu6
ProcVersionSignature: Ubuntu 3.0.0-10.16-generic 3.0.4
Uname: Linux 3.0.0-10-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Mon Sep  5 23:52:54 2011
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=fr_BE.UTF-8
SourcePackage: synaptic
UpgradeStatus: Upgraded to oneiric on 2011-09-02 (3 days ago)

** Affects: synaptic (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug oneiric running-unity

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https://bugs.launchpad.net/bugs/842179

Title:
  Short after upgrade, Synaptic failed to open but apt-get still works

Status in “synaptic” package in Ubuntu:
  New

Bug description:
  Following screen pops up when opening synaptics (sudo) : application
  will close when confirming dialog box

  E: The value 'natty-proposed' is invalid for APT::Default-Release as such a release is not available in the sources
  E: _cache->open() failed, please report.

  Where can natty-proposed be disabled as default release, tried purging
  several locations in older posts without success.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: synaptic 0.75.2ubuntu6
  ProcVersionSignature: Ubuntu 3.0.0-10.16-generic 3.0.4
  Uname: Linux 3.0.0-10-generic x86_64
  NonfreeKernelModules: nvidia
  Architecture: amd64
  Date: Mon Sep  5 23:52:54 2011
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  ProcEnviron:
   SHELL=/bin/bash
   PATH=(custom, no user)
   LANG=fr_BE.UTF-8
  SourcePackage: synaptic
  UpgradeStatus: Upgraded to oneiric on 2011-09-02 (3 days ago)

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