Install button in Software Centre does not work, can't install packages through GUI

[tsj]

Clicking on the Install button in the Software Centre does nothing (no error messages, no password prompts to start the install). Apt-get install works.

Here's some basic info:

tsj@linux-laptop:~$ lsb_release -rd
Description: Ubuntu quantal (development branch)
Release: 12.10
tsj@linux-laptop:~$ apt-cache policy software-center
software-center:
  Installed: 5.3.3.1
  Candidate: 5.3.3.1
  Version table:
 *** 5.3.3.1 0
        500 http://us.archive.ubuntu.com/ubuntu/ quantal/main amd64 Packages
        100 /var/lib/dpkg/status

If you need more info let me know.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: software-center 5.3.3.1
ProcVersionSignature: Ubuntu 3.5.0-2.2-generic 3.5.0-rc4
Uname: Linux 3.5.0-2-generic x86_64
ApportVersion: 2.2.5-0ubuntu2
Architecture: amd64
Date: Wed Jul 4 22:15:14 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120627)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: software-center
UpgradeStatus: No upgrade log present (probably fresh install)

[Gary Lasker (gary-lasker)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 785117, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.

Many thanks!