package gforge-plugin-mediawiki 4.8.2-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 255

[John Wilson]

Binary package hint: gforge

Have been getting this error message ever since I upgraded to Lucid.
Since upgrading to Lucid Update Manager has to be started manually and then I get this error message.
Have reported this bug as part of bug 657754
Have installed the current MainBuild and will report if this cures it

ProblemType: Package
DistroRelease: Ubuntu 10.04
Package: gforge-plugin-mediawiki 4.8.2-1
Uname: Linux 2.6.36-999-generic i686
Architecture: i386
Date: Sat Oct 9 10:07:06 2010
ErrorMessage: subprocess installed post-installation script returned error exit status 255
PackageArchitecture: all
SourcePackage: gforge
Title: package gforge-plugin-mediawiki 4.8.2-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 255