I tracked this down to python failing to run, which was fixed by rebooting into the most recent kernel. This kernel had been installed but I did not reboot, which I believe caused a mismatch, probably with libc and therefore python.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to language-selector in Ubuntu. https://bugs.launchpad.net/bugs/1017255 Title: package language-selector-common 0.79 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1 Status in “language-selector” package in Ubuntu: Won't Fix Bug description: Upgrading my former primary system (Lubuntu 11.10) to 12.04 - primarily to test the upgrade process, but also to give me a backup system. The upgrade process detected a problem installing the language selector. I don't use languages other than U.S. English, but I do use the Dvorak keyboard layout. ProblemType: Package DistroRelease: Ubuntu 12.04 Package: language-selector-common 0.79 ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18 Uname: Linux 3.2.0-25-generic i686 ApportVersion: 2.0.1-0ubuntu8 Architecture: i386 Date: Sun Jun 24 14:30:46 2012 ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 1 InstallationMedia: Lubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012) PackageArchitecture: all SourcePackage: language-selector Title: package language-selector-common 0.79 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1 UpgradeStatus: Upgraded to precise on 2012-06-24 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/language-selector/+bug/1017255/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

