package libreoffice-core 1:3.5.7-0ubuntu5 failed to install/upgrade: paquetes en conflicto - no se instalará libreoffice-core

[RADIONAUTA]

repeatedly over and over... appears this error

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: libreoffice-core 1:3.5.7-0ubuntu5
ProcVersionSignature: Ubuntu 3.5.0-52.78~precise1-generic 3.5.7.33
Uname: Linux 3.5.0-52-generic i686
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: i386
Date: Sun Sep 7 21:43:32 2014
DuplicateSignature: package:libreoffice-core:1:3.5.7-0ubuntu5:paquetes en conflicto - no se instalará libreoffice-core
ErrorMessage: paquetes en conflicto - no se instalará libreoffice-core
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release i386 (20130213)
MarkForUpload: True
SourcePackage: libreoffice
Title: package libreoffice-core 1:3.5.7-0ubuntu5 failed to install/upgrade: paquetes en conflicto - no se instalará libreoffice-core
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Rico Tzschichholz (ricotz)]

Thank you for taking the time to report this bug and helping to make
Ubuntu better. It seems that there was an error on your system when
trying to install a particular package. Please execute the following
command, as it will clear your package cache, in a terminal:

sudo apt-get clean

Then try performing the update again. This will likely resolve your
issue, but the failure could be caused by filesystem or memory
corruption. So please also run a fsck on your filesystem(s) and a
memory test. Thanks in advance!