PPC: Error while updating/upgrading 14.04 installation

PPC: While attempting to update/upgrade existing 14.04 installation via the Terminal, I get the following error:

Setting up libtxc-dxtn-s2tc0:powerpc (0~git20131104-1) ...
update-alternatives: error: alternative path /usr/lib/x86_64-linux-gnu/libtxc_dxtn_s2tc.so.0 doesn't exist
dpkg: error processing libtxc-dxtn-s2tc0:powerpc (--configure):
 subprocess installed post-installation script returned error exit status 2
Errors were encountered while processing:
 libtxc-dxtn-s2tc0:powerpc
E: Sub-process /usr/bin/dpkg returned an error code (1)
lubuntu1404@ubuntu:~$ ubuntu-bug dpkg

(process:1815): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: dpkg 1.17.1ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-3.5-powerpc-smp 3.11.3
Uname: Linux 3.11.0-3-powerpc-smp ppc
ApportVersion: 2.12.7-0ubuntu3
Architecture: powerpc
CurrentDesktop: LXDE
Date: Mon Dec 30 09:32:16 2013
InstallationDate: Installed on 2013-12-19 (10 days ago)
InstallationMedia: Lubuntu 14.04 "Trusty Tahr" - Alpha powerpc (20131218)
SourcePackage: dpkg
UpgradeStatus: No upgrade log present (probably fresh install)