Résumé : ABSTRACT: An international conference on Transposable Elements (TEs) was held 21--24 April 2012 in Saint Malo, France. Organized by the French Transposition Community (GDR Elements Genetiques Mobiles et Genomes, CNRS) and the French Society of Genetics, the conference's goal was to bring together researchers from around the world who study transposition in diverse organisms using multiple experimental approaches. The meeting drew more than 217 attendees and most contributed through poster presentations (117), invited talks and short talks selected from poster abstracts (48 in total). The talks were organized into four scientific sessions, focused on: impact of TEs on genomes, control of transposition, evolution of TEs and mechanisms of transposition. Here, we present highlights from the talks given during the platform sessions. The conference was sponsored by Alliance pour les sciences de la vie et de la sante (Aviesan), Centre national de la recherche scientifique (CNRS), Institut national de la sante et de la recherche medicale (INSERM), Institut de recherche pour le developpement (IRD), Institut national de la recherche agronomique (INRA), Universite de Perpignan, Universite de Rennes 1, Region Bretagne and Mobile DNA. Chair of the organization committee Jean-Marc Deragon Organizers Abdelkader Ainouche, Mireille Betermier, Mick Chandler, Richard Cordaux, Gael Cristofari, Jean-Marc Deragon, Pascale Lesage, Didier Mazel, Olivier Panaud, Hadi Quesneville, Chantal Vaury, Cristina Vieira and Clementine Vitte.