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, the second release candidate of LibreOffice 4.1 has been released a few days ago. A full list of bugfixes and new features can be seen in the official release announcement.In this article I will show you how to install LibreOffice 4.1.0 RC2 on Ubuntu 13.10 Saucy Salamander, Ubuntu 13.04 Raring Ringtail, Ubuntu 12.10 Quantal Quetzal, Ubuntu 12.04 Precise Pangolin, Linux Mint 16 Petra, Linux Mint 15 Olivia, Linux Mint 14 Nadia, Linux Mint 13 Maya, Debian Jessie, Debian Sid, Debian Wheezy, Debian Squeeze, Knoppix, Crunchbang OS and other Debian based distributions.
It is not available yet via repository or PPA, so the rocket science geeks that want to test it need to do the following, in order to install it on Ubuntu / Debian / Linux Mint & derivates.
Instructions for 32 bit systems:
$ wget -c download.documentfoundation.org/libreoffice/testing/4.1.0/deb/x86/LibreOffice_4.1.0.2.0_Linux_x86_deb.tar.gz
$ tar -xzvf LibreOffice_4.1.0.2.0_Linux_x86_deb.tar.gz
$ cd LibreOffice_4.1.0.2.0_Linux_x86_deb/DEBS
$ sudo dpkg -i *.deb
Instructions for 64 bit systems:
$ wget -c download.documentfoundation.org/libreoffice/testing/4.1.0/deb/x86_64/LibreOffice_4.1.0.2.0_Linux_x86-64_deb.tar.gz
$ tar -xzvf LibreOffice_4.1.0.2.0_Linux_x86-64_deb.tar.gz
$ cd LibreOffice_4.1.0.2.0_Linux_x86-64_deb/DEBS
$ sudo dpkg -i *.deb