The Document Foundation released second release candidate of LibreOffice 3.5.5. This release features a lot of new bug-fixes, including one which caused the office suite to crash when opening RTF files. This is a development release and not meant for ideal home and enterprise usage.
LibreOffice 3.5 introduces a different kind of encryption that promises to keep your documents more secure. Also there is improved ODF support and lots of changes in LibreOffice Calc and impress.
In case you would like to get this testing version, read this wiki page.