[Bug 818507] Re: When TRY updating 3rd party software, it wrote me error like" Instalation of packages from non-prooven sources; this action require installation from non-prooven sources"

[Kiwinote]

*** This bug is a duplicate of bug 705988 ***
    https://bugs.launchpad.net/bugs/705988

Hi Tomas! Thanks for your bug report. We are tracking this issue over at
bug 705988. Please continue to report any bugs you may find in software-
center. Thanks again for your help!

** This bug has been marked a duplicate of bug 705988
   [master] Untrusted packages can not be installed

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to software-center in Ubuntu.
https://bugs.launchpad.net/bugs/818507

Title:
  When TRY updating 3rd party software, it wrote me error like"
  Instalation of packages from non-prooven sources; this action require
  installation from non-prooven sources"

Status in “software-center” package in Ubuntu:
  New

Bug description:
  When TRY updating 3rd party software, it wrote me error like" Instalation of packages from non-prooven sources; this action require installation from non-prooven sources" And there is just CLOSE button. its happen with OPERA, flexibee.
  Only way how to fix it is REMOVE vendor from SOFTWARE sources and download it manualy. EVEN after installing KEY it do same bullshit.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: software-center 4.0.4
  ProcVersionSignature: Ubuntu 2.6.38-10.46-generic 2.6.38.7
  Uname: Linux 2.6.38-10-generic x86_64
  NonfreeKernelModules: wl fglrx
  Architecture: amd64
  Date: Sat Jul 30 15:04:02 2011
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=cs_CZ:en
   LANG=cs_CZ.UTF-8
   SHELL=/bin/bash
  SourcePackage: software-center
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/software-center/+bug/818507/+subscriptions