LibreOffice 4.1.2 has been released few days ago and finally Eric Hameleers has finished updating his SlackBuild script to work with the new 4.1.x family and uploaded his LibreOffice packages to his miror sites (taper.alienbase.nl), while the main server (alien.slackbook.org) is currently down since the hosting machine (harriers) had a SATA controller failure (see his Tweet).
It's been some time since LibreOffice 4.0.5 as his last updated packages for Slackware and this release (4.1.2) is provided for Slackware 14.0 and Current (aka 14.1). For Slackware 13.37, you should continue to use the older version or upgrade to Slackware 14.0 or Current to enjoy the latest LibreOffice package.
LibreOffice 4.1.2 brings so many new features compared to 4.0.5, but only bug fixes compared to 4.1.0 and 4.1.1. List of changes since 4.1.1 can be seen on the RC1, RC2, and RC3 ChangeLog, while new features on LibreOffice 4.1 can be seen on the official announcement and features page.
For now, LibreOffice built by Eric can be downloaded from this mirror sites: