Installation fails with "trying to overwrite '/usr/share/locale/sl/LC_MESSAGES/.mo', which is also in package gstreamer0.10-plugins-ugly:amd64 0.10.19-2ubuntu2"

[IlarioGelmetti]

Related to bug https://bugs.launchpad.net/bugs/1266141

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubiquity 2.17.3
ProcVersionSignature: Ubuntu 3.12.0-7.15-generic 3.12.4
Uname: Linux 3.12.0-7-generic x86_64
ApportVersion: 2.12.7-0ubuntu3
Architecture: amd64
CasperVersion: 1.336ubuntu1
Date: Mon Jan 6 00:39:27 2014
InstallCmdLine: initrd=/ubninit file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash -- BOOT_IMAGE=/ubnkern
LiveMediaBuild: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140105)
ProcEnviron:
 LANGUAGE=it_IT.UTF-8
 PATH=(custom, no user)
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)