Edit: Due to the fact that this article is old, the installation instructions may not work anymore. In order to successfully install the latest version of LibreOffice, please access the libreoffice tag and open the latest article (the one on top).

The latest installation instructions for LibreOffice
Hello Linux Geeksters. As you may know, LibreOffice is the most popular open-source office suite, available for Linux, Windows and Mac OS X. The latest version available is LibreOffice 4.3.7 “Still”, which has been recently released, bringing bug-fixes.
In this article I will show you how to install LibreOffice 4.3.7 on Ubuntu, Linux Mint, Pinguy OS, Elementary OS, Deepin, Peppermint, LXLE, Linux Lite, Kwheezy, Crunchbang and other Ubuntu and Debian derivative systems.
To install LibreOffice 4.3.7 on Ubuntu, Debian and derivative systems, we have to remove the current libreoffice version, download the archive containing the libreoffice packages from the official site, extract the archive and install the deb packages inside. Follow the instructions for you system and architecture exactly, in order to get a successful installation.
How to install LibreOffice 4.3.7 on 32 bit Ubuntu, Debian and derivative systems:
$ sudo apt-get install gdebi
$ sudo apt-get remove libreoffice*
$ wget http://download.documentfoundation.org/libreoffice/stable/4.3.7/deb/x86/LibreOffice_4.3.7_Linux_x86_deb.tar.gz
$ tar -xzvf LibreOffice_4.3.7_Linux_x86_deb.tar.gz
$ cd LibreOffice_4.3.7.2_Linux_x86_deb/DEBS
$ sudo gdebi *.deb
How to install LibreOffice 4.3.7 on 64 bit Ubuntu, Debian and derivative systems:
$ sudo apt-get install gdebi
$ sudo apt-get remove libreoffice*
$ wget http://download.documentfoundation.org/libreoffice/stable/4.3.7/deb/x86_64/LibreOffice_4.3.7_Linux_x86-64_deb.tar.gz
$ tar -xzvf LibreOffice_4.3.7_Linux_x86-64_deb.tar.gz
$ cd LibreOffice_4.3.7.2_Linux_x86-64_deb/DEBS
$ sudo gdebi *.deb
Optional, to remove LibreOffice 4.3.7 from either Ubuntu, Debian or a derivative system, do:
$ sudo apt-get remove libreoffice*