package libgksu2-0 2.0.13~pre1-1ubuntu4.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

This, and other install/upgrade problems with a host of other packages (bug-buddy, evolution, gnome apps, totem to name but a few) has been occurring for about a month or so, and seemed to coincide with updating evolution via the update manager (though I'm not certain).

I think I've managed to fix most of the install/upgrade errors after reading an article that recommended editing the post installation and post remove files for the various apps. This involved negating the 'set -e' line by typing a hash (#) at the beginning of the line. In some cases it was necessary to negate all lines within the file by the same method. However, doing the baove doesn't appear to have worked in this case.

If further information is required, please specify exactly where it is to be found, as I'm new to linux.

Thanks.

ProblemType: Package
DistroRelease: Ubuntu 10.04
Package: libgksu2-0 2.0.13~pre1-1ubuntu4.1
ProcVersionSignature: Ubuntu 2.6.32-26.46-generic 2.6.32.24+drm33.11
Uname: Linux 2.6.32-26-generic i686
Architecture: i386
Date: Sat Dec 18 19:08:26 2010
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Guadalinex V7 GSD "Lince" - Final i386 (20100611)
SourcePackage: libgksu
Title: package libgksu2-0 2.0.13~pre1-1ubuntu4.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1