while running apt-get upgrade in terminal, it crashed. Just recently I've used firefox and flash. I did press the dash key about the same time as the crash message ocured

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package gstreamer1.0-plugins-ugly 1.2.2-1ubuntu1 failed to install/upgrade: försöker skriva över "/usr/share/locale/sl/LC_MESSAGES/.mo" som också finns i paketet gstreamer0.10-plugins-ugly:amd64 0.10.19-2ubuntu2

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: gstreamer1.0-plugins-ugly 1.2.2-1ubuntu1
ProcVersionSignature: Ubuntu 3.12.0-7.15-generic 3.12.4
Uname: Linux 3.12.0-7-generic x86_64
ApportVersion: 2.12.7-0ubuntu4
Architecture: amd64
Date: Sun Jan 5 09:40:32 2014
DuplicateSignature: package:gstreamer1.0-plugins-ugly:1.2.2-1ubuntu1:försöker skriva över "/usr/share/locale/sl/LC_MESSAGES/.mo" som också finns i paketet gstreamer0.10-plugins-ugly:amd64 0.10.19-2ubuntu2
ErrorMessage: försöker skriva över "/usr/share/locale/sl/LC_MESSAGES/.mo" som också finns i paketet gstreamer0.10-plugins-ugly:amd64 0.10.19-2ubuntu2
InstallationDate: Installed on 2014-01-02 (2 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140102)
SourcePackage: gst-plugins-ugly1.0
Title: package gstreamer1.0-plugins-ugly 1.2.2-1ubuntu1 failed to install/upgrade: försöker skriva över "/usr/share/locale/sl/LC_MESSAGES/.mo" som också finns i paketet gstreamer0.10-plugins-ugly:amd64 0.10.19-2ubuntu2
UpgradeStatus: No upgrade log present (probably fresh install)