The SVN for french version of WordPress Mu 2.8.6 have the wrong package (version 2.8.5.2).
http://svn.automattic.com/wordpress-i18n/fr_FR/tags/mu-2.8.6/
I made my own version, with some new strings, a some corrections : http://medialab.samizdat.net/pub/wordpress-mu/
It's there a way to make a french team for maintening this translation ?