Comment 3 for bug 785117

I have a similar problem

Bug description:
  My Synaptic Package Manager will not load from the menu. It will load
  from the Terminal. Sodtware centre will load but will not install or
  remove programmes. Can anyone help?

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: software-center 5.0.4
  ProcVersionSignature: Ubuntu 3.0.0-16.28-generic 3.0.17
  Uname: Linux 3.0.0-16-generic i686
  ApportVersion: 1.23-0ubuntu4
  Architecture: i386
  Date: Wed Mar 7 15:15:26 2012
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
  PackageArchitecture: all
  SourcePackage: software-center
  UpgradeStatus: Upgraded to oneiric on 2012-02-17 (19 days ago)