The LibreOffice conference sites for 2012 and 2013 are running on Plone. I updated them to version 4.2.7 of Plone, a bugfix release. The LibreOffice extensions- and templates sites are running still version 4.2.6. An update to version 4.2.7 gave an error message that needs some investigation and time to fix.
The ODFAuthors site is running the newest release line, 4.3.x. I updated this one from 4.3.2 to 4.3.3 without any issues yet. It’s always a pleasure to update Plone via buildout.