LibreOffice 5.3 will be announced at the end of January 2017, with a large number of new features which are summarized on the release notes page: https://wiki.documentfoundation.org/ReleaseNotes/5.3. In order to find, report and triage bugs, the QA team is organizing a second bug hunting session on Friday, November 25, 2016. Tests will be performed on the Beta version of LibreOffice 5.3, which will be available on the pre-releases server (http://dev-builds.libreoffice.org/pre-releases/) a few days before the event. Builds will be available for Linux (DEB and RPM), MacOS and Windows, and will run in parallel with the production version.
Mentors will be available on November 25, 2016, from 8AM UTC to 10PM UTC. Of course, hunting bugs will be possible also on other days, as the builds of this particular Beta release (LibreOffice 5.3.0 Beta1) will be available until mid December.
During the day there will be two dedicated sessions: the first to chase bugs on the main LibreOffice modules between 3PM UTC and 5PM UTC, and the second to test a set of the top 7 features between 5PM UTC and 7PM UTC. All details of the second bug hunting session are available on the specific wiki page: https://wiki.documentfoundation.org/QA/BugHuntingSession/5.3.0Beta1.
During the dedicated sessions, we will concentrate all efforts to chase and reproduce the bugs, in order to confirm and file them in a more comprehensive way. Of course, the more comprehensive will be the bug report, the easier will be for the developers to solve the bugs in time for the final release.