Joomla 3.5 Beta 1 is released on November 7th. Community members are asked to download and install the package in order to provide quality assurance for the forthcoming 3.5 release.
Joomla! 3 is the latest major release of the Joomla! Which was released back in 2012 followed by other minorupdates. Please note that Joomla 3.5 is not a major release and going from 3.4 to 3.5 is just a one-click upgrade and not a Migration. Community members and strictly advised not to upgrade any of the production sites to Joomla 3.5 Beta 1 as this Beta version is only intended for testing and there is no upgrade path.
What are the intentions behind releasing this beta version?
Joomla 3.5 beta one should only be used on the test site and not on the production. Extension and Template developers are encouraged to work with this version in order to design extensions for next stable release of Joomla, i.e., Joomla 3.5. Also, users are encouraged to test the package and report the issues to the Joomla! CMS Issue Tracker if found.
For more information on Joomla 3.5 beta 1: https://www.joomla.org/announcements/release-news/5637-joomla-3-5-beta-1-released.html